At the top of the list, in order of appearance:
Sapphira for intellectual conversation
Chupperson for weirdness
Lizard Dude because he's plain cool
Watoad because he's nearby
Luigison for MX Flash study and physics
Markio, remembering the Markio2D.mp3 project
My sincere apologies to those who I haven't conversed with quite as much. Unlike some other people, I don't really care how I would meet the respective people. All at once, one at a time, etc. Also, note that there are more reasons. The ones listed above are the primaries.