1. Gen 13
Nothing beats the original from Jim Lee and Image comics! DC pretty much trashed this title, but I hear it might make a comeback.
2. New Mutants
I've loved this title since I was a kid.
Now I'll be honest here... The actual teams I loved the most out of all their incarnations would have to be either the one from Giant-Size X-men or the Blue and Gold teams from X-men #1 which Jim Lee revamped.
4. Teen Titans
There's some DC love for you.
5. Cyber Force
A great team from Top Cow... even though some cry about the characters looking too much like X-men. Whatever.
My favorite characters from this team are Multiple Man, Strong Guy, Polaris, Havok and Wolfsbane. I loved the line Strong Guy used when someone made fun of his name once... "Well, I could have gone with Super Man, but that's just waaay too corny!"
I love seeing them in crossovers. I really wish they would make a movie or cartoon series with this team.
8. Power Pack
Yep. This is an old favorite of mine from when I was a kid. The writing and art would top notch for that time and are still looked on as great today.
9. Team 7
This was one of my favorites from when I was in college and after.
There have been some great characters to come out of this title's pages... Domino for instance.