I chose glossy. Here are some of my insights:
I only see reflections if there is a light directly behind me at screen level. Ceiling lights in my room are not at the right angle. usually if there is a reflection, just angle the screen a bit and it goes away. If you go outside, you will get reflections. But I kind of like them... with matte and a lot of light (when outside) the whole screen sort of gets cast over with light and the picture gets washed out. With glossy you get to see pretty trees and things around you. It makes things everyday tasks (like typing a paper, surfin the net, etc... nice). But you will have to have the screen brightness up pretty high.... the reflections Just not distracting to me. I also noticed that under normal conditions you won't see reflections, but if you move your head from side to side, you can sort of see movement on the screen (which would be the reflections) but that is only if you shake your head a lot while computing. Maybe someone with a matte screen can confirm this only happens with glossy...could be some weird backlight thing. Overall, i'm glad I chose glossy. Never had issues, with it so... it's fine.
One thing to note though, I had to go through 2 replacements (this is my 3rd one) to get a screen without the bottom yellowing (this one still has it a little bit but I'm not going through that again). I ordered my MBP at the end of august, and didn't end up getting it (well, one that was acceptable to use) until Mid October.... so it was pretty horrible. it's possible that the glossy's are more likely to have this, but that is not confirmed. i