Psion
Adventurer
I like it with my friends, but hate it with most strangers.
Interesting way to put it.
I chose to answer the question in the context of what the system has given me. To wit: love it.
Now I do pretty much despise the sort of mindset such as "Mordenkainen's Disjunction is a horrrrrrible spell and should be banned because it can do milllllions of gp of damage and the DMG says I'm entitled to X gp for my levellll..." I despise that some players have made the magic item system into an extension of the PC build system.
But this has never really been a big problem for me in my home games, so really doesn't affect me personally that much. So what I'm left with is a system that finally delivered on many long promised awesome gaming experiences that prior games delivered imperfectly at best.