Mine's... - Double-locks - Having to open up my stick to switch it to 4-way - Sucking at playing with a stick - Others comparing me to other TGM players ("You'll never be as good as the Japanese" or, for those who know me IRL, the obligatory comparison to Kitaru) - Control schemes along the lines of "sideways movement and rotation on one hand and hard dropping on the other"--kinda moot when I can change the controls, but this is why I couldn't stand Blockles when it was multiplayer Tetris. - Hearing people bring up Game Boy and NES Tetris when they watch me play TGM - No lock delay