Going to post my PERSONAL Roblox Confession...
When I was younger, I used to play DOORS and 3008 24/7. When I saw the IKEA Floor in Regretevator for the first time, I almost SCREAMED! Holy shit! IKEA! 3008 IKEA!
I have so many memories of just goofing around with friends in 3008, roleplaying, building awesome forts, jumping employees and then getting jumped BY employees... it was especially fun because one of my best friends used to have a private server, so we didn't have to even worry about other players breaking in and stealing our stuff.
The public server experience was, well... insane, to say the least. Materials were always hard to come by, you could never find food or anything to build a base with, and people would constantly grief you. But at the end of the day, sometimes that made managing to survive another night all the more thrilling.
I might revisit good old 3008 some day! For now, I'll stick to my trusty Evade, Regretevator, and Dandy's World though. :-)