Too many to list dating back to when I was a kid, but Dan Marino was the most memorable. I'd say the Marks Bros. were the coolest and most down to earth, and Kenny Stills is just a flat out awesome dude. Really enjoyed shooting the **** with Sam Madison as well. I was in high school, and I played both WR/CB and he gave me some tips that I'll pass down to my son when he's ready to suit up.
Only negative experience was with Jason Taylor. No surprise there. He's a douchebag. Zach Thomas actually apologized for his buddy being "in a bad mood" -- several people have said the same about him.