So are Domains like Adept Ways, where you can only follow 1, or like Magician Arts, where you can initiate into multiple ones?
I was thinking of them as being like the Magician Arts, but brainstorming like crazy hasn't resulted in a plethora of options, so maybe they should be more like an Adept Way? Jury's still out on this one.
I don't know, I just thought of them as like mindsets for Technomancers.
No worries, amigo. I wasn't trying to criticize.

A part of the resonance that meshes with their personality and enhances their abilities. I don't actually have that good of an explanation for it; I just thought about it and wrote something. It's definitely a first draft and needs to brainstorming to improve. My main reasoning for the categories are the specialties that a Technomancer could gravitate towards. Some like to be subtle, that one is obviously Hacking. Some like to be noisy and strip code and firewalls wherever they go - that would be Cracking. I then thought about how Electronic Warfare basically encompasses all of communications, but there are really 2 sides to it. There's the subtle side, like intercepting messages and spoofing commands; and then there's the obvious side, like jamming, other noise manipulation, and, in my mind, disruption of signals such as marks. So, I split that group into 2. Finally, I thought about Sprites and how you could maybe create a Compiler, the Matrix version of a Conjurer. Some people may not even do their own hacking, but instead create a veritable army of versatile sprites, so I included that as an option.
We're definitely using the same rationale here, let's keep going. If we can get more than 5, I think we have a good shot at making this VERY viable.
If anything, I would possibly combine Jamming and Subverting and put in Remote Operations. That would include stuff like drones, control device, and echoes like Biowire, Acceleration and Mesh Reality.
That would be awesome actually - all of the communication between the Matrix and the physical world under the one umbrella. I definitely like this.
I would also just like to say, since I don't think I have, that I really like your houserules on Technomancers. I never played 4th, so all of this is still somewhat new to me, and it looks like it would make a Technomancer actually appealing to play.
Thanks!

I would like to suggest the addition of a Reflex Recorder complex form. Subject to the Same limits as a Bioware Reflex recorder. The idea being a real world macro basically.
That would be a really nifty enhancement for a technomancer that uses their powers in their meat bodies. Hmm, that makes me think of this as the domain list:
- Hacking - this would be the subtle cousin of Cracking, focusing on manipulation of data to allow spoofing, file edits, and such
- Cracking - this is the angry drunken uncle of Hacking, focusing on breaking through firewalls, obliterating IC, and causing havoc to systems
- Remote Operations - this domain focuses on the signals that travel between the physical world and the Matrix
- Body Mods - this domain uses the technology and evolution of technomancers to take them to the next level, giving technomancers almost Adept-like powers
- Sigint - this domain focuses on the acquisition and denial of intelligence and misinformation
- Compiling - this domain focuses on the Resonance, and the compiling and registering of Sprites
So each domain would have a new Matrix Action and/or Complex Form they could perform, along with an Echo and/or Advanced Echo (jury's still out on that too). For instance, the Sigint Technomancer would get a Matrix Action to manipulate the data feeds of opposing forces' smartguns, causing them to miss more often. They could also get a Complex Form to block or create noise in an area, like the Living ECM Echo. The Body Mod Technomancer might get Echoes and Complex Forms that can replicate certain pieces of cyberware, like the Acceleration and Biowire Echoes. Or even the ability to use a Complex Form to replicate a smartlink that is implanted, giving you the full bonus as if you had the implant. Of course, it has to be sustained, so that might not be balanced well. Remote Operations might get an Echo that allows them to use their Mental Attributes to create a Living RCC, but they can only use the Simrig or the Persona at a time.
I REALLY like the Compiler Technomancer - I feel that a Great Form Sprite would be a great boon to a Technomancer, as well as something akin to an Ally Spirit, maybe? The Body Mods Technomancer fits with the rumors in canon of technomancers that are exhibiting adept-like powers. Not sure on Sigint, Hacking, and Cracking yet - I feel like those need more thought to make them unique and interesting, without making them too powerful.