Sticker Star RUINED Paper Mario!! I'm a hardcore Paper Mario fan, and I can tell they didn't put ANY thought into sticker star.
First, the story was SUPER cliche'! the first Paper Mario had an excuse due to it being the first Paper Mario game, but sticker star plot is basically "the princess is captured go save her" type of story with the sticker story background. Look at SMP, the story was convoluted but ATLEAST the princess is captured story was kept MUCH smaller. Heck! They even let you play as peach! TTYD had the best story out of the PM games, it didn't need to rely on old customs, and innovated by giving you a bigger world, new characters, and a new plot!
Second, the battle system was horrible. In PM and PMTTYD, the battle system was fun and the action commands were awesome! Sure SPM featured a 'platforming" element but in all three games there WAS a point to battling enemies! You could level up and get coins for your troubles, which means you could take on bosses without dying. Sticker Star decided to add in BS and gave us the STICKER system. and the thing is those stickers are YOUR attacks. So if you run out of stickers in battle you basically CANT do anything except run away! They introduced the stupid "heart" quests and removed EXP in favor of stronger stickers, which btw STRONGER STICKERS COST MONEY.
Third, the "thing" stickers broke the game! SS introduced "thing stickers" which were stickers based on "things" you find in the overworld like scissors or a fan. Now thing stickers was one gimmick for the game that was interesting to say the least. but the thing is that they were WAY too overpowered. You could basically win one battle by using thing stickers. You could spend 1 hour beating this freaking pokey king, but you could have used the baseball bat to win the battle in three minutes. They aren't even that creative with the bosses, the only creative fight was with the final boss which mind you is the WORST BOSS.
These are MANY complaints with Sticker Star that I've experienced and I'm sad that Paper Jam is going to be the same story with the setting and inspiration from SS:(:(:(