I will now post my thoughts on what I did and why. I actually am a lot more organic with character creation, flipping back and forth to different sections, but am organizing my thoughts in order of the character sheet to make it easier to follow along.
First was Character Concept: A Combat mage. At first I was going to go with a Magician, however I feel Init is the live or die attribute and while there are spells that could have covered this, I like the certain of adept powers, so Mystic Adept. Loose some Karma and Astral Projection is a reasonable loss to me.
I then looked at magical traditions, wanting to do something either Charisma or Intuition based (Help with social skills or Perception and Init). I decided on Christian, as it would allow some interesting hooks.
Next choice was character creation option: I went with Standard as I did not know what options were available to you. If I were using sum-10 I would have probably not done anything different.
Race (D)I knew I would have to have Race and resources in D-E, I chose D for race as I do not feel mages need much in resources. However this limited me to human or elf. I like humans, I like edge, if you live or die by init, then edge is your safety net. However Elf would not be bad here as it would add 2 points to your drain attribute and 1 point to your agility. I decided edge would be more valuable.
Attributes (B)I first started with maxing out his Drain Attributes, then put everything else to 3. I was running one short so removed it from Strength. Mages do not need to be strong, but I wanted to make sure I was not to poor in attributes
Skills (C)I feel that the 4 most important skills for a mage are Spellcasting, Counterspelling, Summoning, and Assensing so they went on the sheet. Everyone should know stealth, a weapon skill, perception, and some etiquette. Started playing around with skills. Assensing took a minor hit, and did not have enough to go around to everything, but maxed out the basic mage skills and his weapon skill. Put on some specs, etc... You can see the final product. Note that I knew he did not need a lot of etiquette so I used my 2 skill group points which also got be Negotiation and Leadership (Which was lucky when I got to qualities)
I knew the character would be resources hurting so I decided that he would be from a poorer side of Seattle. This helped define his knowledge skills.
QualitiesI feel that the best quality for a mage is Mentor Spirit, so started there. I also knew that I would only spend 20 points on Qualities as I need 30 for my Adept powers. With 15 to go I went to my other go to for mages: Focused concentration, only being able to afford level 3, and with 3 karma left over I decided that Quick Healer would be nice. I already knew he would have the Heal spell, and felt it went thematically with the religious angle.
I then looked at mentor spirit choices, knowing I wanted a combat mage I found Wise warrior to be a good thematic choice. The +2 to combat spells, and disadvantage really drew me towards it. The +2 to leadership was a nice bonus and made me glad I had used my skill group points the way I did.
For the negative Qualities, well my sense of humor kicked in and I decided that he would be a SINer (as all are in the eyes of God

. Went with National. I also liked the idea of him squatting at a church, so decided that he works at a church to part time with some unskilled labor. I also liked the idea of a code of honor for him due to the religious angle, however none quite fit right, so went with Thug Life, but reskined it a bit to represent him tithing and displaying his religion.
Magic (A)Adept powers came first: I knew that I wanted him to have Astral Perception and Enhanced Reflexes (2 or 3). So starting with those on the sheet I went through keeping the basic concept of a Combat Mage with a religious angle in mind. I chose Linguist because I thought it would be a fun power for him (Speaking in tongues). I also liked Combat Sense and Danger Sense (Divine protection). With one Power Point Left I debated but decided that he needed some help in Perception, so 2 points of enhanced Perception it is
Spells were next. I looked at the recommended spells for a christian and liked most of them so put them on the sheet (except Increase limits). I then went to a few of my go to spells (Magic Fingers and Trid Phatasim). 4 spells remaining, started looking over things, knowing he is a combat mage I chose two more combat spells that would give different options (Stun and Mana bolt) That left two spells and chose levitate (walking on water) and increase noise (I thought of it as a good option as a subtle miracle type thing)
Resources (E)UGG, 6k in nuyen...not much.
First Basic gear, armor, comlink, and weapon...Ok, an Armored Jacket, always worth every nuyen (1k...ouch, but needed). I had decided that he would use a Machine Pistol, nice balance of die, concealibility, etc...My sense of humor kicked in again, I like the name of the Crusader...plus it is one of the nicest Machine Pistols in the game...a little pricey and money is tight so just one clip of regular ammo (910 nuyen...more ouch). And a comlink, metalink it will have to be, but wait the Sony Angel is the same comlink (Stat wise) but has that religious angle, going with that instead. At this point I have spent 2,010 nuyen... only 3,990 left.
Next is a fake ID, i debated on letting him just use his SINner but decided it was better to have a fake one that he used on runs so a fake ID; 2.5K for a level 1...ugg. Then licences, wanted to practice magic, a concealed weapon, and weapon, another 600. This left me a total of 890.
Life style is next, new I wanted him to be a squatter (at the church). Looking at options however I decided that it was a comfortable squat with decent security so upped those. Total lifestyle cost 600. 290 Nuyen left
Went back to weapons, I like survival knives. Useful gear in the handle, can use to defend yourself in melee. 100 nuyen it is. 190 left
Decided on a concealed holster for the machine pistol (Why advertise)...40 left.
Realized, no cred stick. 35 left
Decided a flashlight to hold him over till he can get some low light glasses, leaving 10. Might as well pick up a second knife for the boot...
Finally contactsWell a fixer is a no brainier. Decided he was still new to the streets, so loyalty 2, also decided his Fixer was a pretty local type guy so contacts 3 (Probably should change this to a 4 and reduce street doc)
A Priest made a lot of sense, so added it
A ganger was next, due to where he lives
Finally a street doc. Honestly if I wasn't rushing he would have become a nurse and moved the Contact points around to make the priest and ganger more loyal and the fixer more connected).
I hope this LONG post helped you see how I do it...