Lord Mhoram
Hero
As others have suggested, what kind of system you want to use will depend largely on the people you are playing with and whether or not you can trust them to not act like jerks. Frex, I think that point buy systems provide mechanical flexibility and accommodate breadth of character concept better than class/level systems, but all of the flexibility in the world is worthless if your players exist only to abuse it.
Seconded that.
I've been lucky that I have a group that has been playing Hero together for something like 8 years in the current incarnation, and over 18 in the core group. We all are friends first, and game together for fun. We never get that kind of annoyance.
I really do have a dream group that way.