It looks like you're new here. If you want to get involved, click one of these buttons!
1. Community - bigger the better
2. Nothing cartoonish please
3. Do Not Suggest - LOTRO, DDO, AOC, L2, EQ2, Aion, LoL
Simple as that
Have you tried Pirates of the Burning Seas?
My suggestion is Vindictus. A really fun F2P game. I had such a blast leveling up in that game and the unique fights that it has with the source engine. As far as a big community, I don't know how big it is. What I do know is if you enjoy action MMOs you will enjoy this one.
DCUO, but be ready to spend some money later or you can try STO quite good its quite free also best would be to buy GW2 once it releases. ( u can pre purchase it already if u want to play during beta weekends )
Start Trek Online (one by Cryptic)