I played Roblox. I actually enjoyed it, and had a nice time. There were a few problems though, before I quit.
First off, yes, the community is bad. Really bad. Most can't spell, play, or shut the hell up. That really lowered my enjoyment of the game.
I had a few friends that were able to script and create really cool things. Everything from a UNSC (Halo) themed group, with ships that flew, fought, etc, drop pods, pelicans, suits, and all the goodies. It was really fun. But the leaders of the group did stupid things, took things too seriously, and the people in the group were just stupid. Dumb, like plain out morons. The group was created, dropped, made new, dropped, made new, dropped an endless amounts of time.
Then there were the updates. Their updates treated everyone like the average 12 year old. I was not an average 12 year old. The game ran fine on an old 4 year old computer, and then after updates it wouldn't run on a very nice computer for me. Instead of fixing the game every update, they made hats that you had to buy, changes in backgrounds, sad contests, and made the building system worse.
The game could've been great, but they failed, and so I play Minecraft