Well, yeah, it's pretty common... most recent one was here, actually. But let's not tear the poor guy's head off. This isn't 'that other forum' after all. :P
Seriously though, lights are very, very subjective. Take some time, hit the 18650 subforum and read through the reviews. Check out the pictures, figure what matches the situations you expect to encounter. If you need help with the terminology, hit up the wiki (conveniently located in the sidebar right over your information).