It's a good series overall, letting characters duke it out with other characters. It's quite entertaining, if I have to say so myself, haha.
I haven't played 64 yet, and I actually don't plan on it either, sadly but I've played Melee and Brawl, so it's better than nothing.
I mainly brawl offline, but once things die down for me on my end, I might reopen my online experience.
I have three teams of characters that I use from time to time....heh.
Team One: Toon Nintendo
Toon Link
Kirby
Pikachu
Jigglypuff
Team Two: Heroes of Air, Time, Honor and Thunder
Pit
Link
Marth
Pikachu
Team Three: Currently under construction...tentative list here.
Wolf
Sheik
Zero Suit Samus
Open
Might make a fourth team later on, dunno yet. Not done with the 3rd, haha.
Accomplishments that no one really cares about:
1. Unlocked all of the characters in SSBB (Don't have Melee.

2. Completed the storyline of Subspace Emissary
Sound off starts now.