You guys are pretty cruel to ROBLOX. I know it's pretty childish and can get boring at times but Jesus. I agree, Minecraft is way better, but ROBLOX is still fun to build in and play in.
I play roblox. Besides the fact the characters look blocky, and it has blocks in it, it has nothing to do with minecraft. Other then the fact people try and make copies of minecraft on it. I play minecraft also. Roblox, in my opinion, isnt "Childish". It IS targeted to kids of all ages though. And most of the people on it are very young, but i find it fun to play with people of my own age (13), just us, without a bunch of random people.