AE West was awesome - but it might have been because I knew nothing about AE and it was the first time meeting a lot of you guys! I was like "That's Trish and Chris Meyer! In PERSON!"
Motion is super awesome - it has a great 'community' feel to it whereas Siggraph has more of a disparate feel. Siggraph's very cool too - but the Motion feel is kind of 'we're all in this together let's help each other out' kind of thing and that's fantastic for relationships and sanity in these crazy fields of design and vfx.
// jayse