Platinum achieved for ModNation Racers (finally)! I need some kind of action game after that, so I decided on Majin & The Forsaken Kingdom, with some breaks here and there with some of my PSN games (mostly Tales of Monkey Island and Strong Bad).
Congratz. How long did it take?
I think I have a total of 45 hours logged onto the game (on my main account), although it's much more than that because I used a self-boosting method to get the 250K Create XP/Level 30 trophies. You basically make like 10 sub-accounts (you don't need that many, but it's recommended) on your PS3 and download your creations from your main account to get XP, then when you go through all 10, go back to your main account and unpublished/republish all creations and do it all over again.
You get a max of 50 creation slots relatively early (60 open at level 28 and 70 at level 29) and you get 120 XP for downloading and viewing per creation, so a total of 50 creations would net you around 6,000 per account. It takes 250K XP to reach level 29 and another 250K on top of that to reach level 30, so if you stick with 50 creations and don't add anymore, you're looking at cycling through 10 accounts a total of 5 times. It takes like 10-15 minutes to download/view all 50 creations, plus another 5 minutes to switch accounts and start up the game.