IMO it also depends on your GM style as well as your players. I portray most of the spirits in my game with fairly distinct personalities, but I also try to show that human logic, ethics and standards do not apply. Another GM may like the strict - all 'elementals' act one way and 'spirits' act another way and that's fine! But to factor in the players here, if I have a world where all spirits ruthlessly try to twist commands to the worst possible outcome because they hate being summoned, that won't necessarily be fun for the players unless they signed on for it (think the world of
Bartimaes). On the flip side if all spirits are happy brightly colored ones (I choose you Fire Elemental!), that might make some people reach for their handy GM ice pick.
Though now I am going to have to have a NPC in my game that has a pokemon theme...the best things come out of these threads!

There is lots of fluff and flavor through the years, but it seems that SR has gone from a more defined spirits and elementals in SR1/SR2 days to an open ended infinite possibilities style. I love the fact that there are spirits on Board of Directors or are advisers to AAA corps now! Even in the early days, my hermetic mage tended to summon elementals with personality because in our game we liked a diverse spirit world. But he also treated them with respect and did his best not to abuse his abilities. Since that was not the thought process of shamans and mages at the time - he was seen as just another nut.
I may have gotten off subject of your question - spirits are very cool! - an unofficial manifesto would also be cool. Or another possibility would be a collection of stories, information and lists that discuss spirits and the theories that surround them. Some postings would be lists of spirits and their abilities, others would be ramblings of hermits and their experience in the spirit meta-realms. Perhaps even a spirit (or something claiming to be one) would "enlighten" humanity and hint at things forgotten.
Good topic prismite! (Also like your shadowrun resource page)
