I wasn't the biggest DC head either but I'm loving this. You can get to 30 in about two days if you're really hardcore about, but to the casual player its not going to happen anywhere near that fast.
Voice chat is buggy right now for the PS3. It works... sometimes. At 30, there's more PvP stuff, more equipment/inv, raids/duos/hard alerts (why I'm having so much fun), and stuff like that.
The game really encourages groups too. Doesn't matter if you're level 30 with some high end gear - 3 or more guys in a group, working together, can fuck you up. Its like that for a lot of things too. There's no penalty for soloing, and the entire campaign can be done alone, but the game really shines when you're in a group. Also, there's nothing quick like a huge PvP brawl... Dropping out the sky into Amusement Mile and letting cat ass heroes know that visiting hours are over.