For Final Fantasy Tactics, if you’re playing the PSP release, install CFW on your PSP (check reddit for a comprehensive guide on that) and then make sure to look up the patches for the game.

The PSP port made the questionable choice of stretching graphics from the original 4:3 aspect ratio into the PSP’s 16:9 screen ratio, and it looks rough. Also, there’s some sort of coding issue that makes most moves with particle effects slow the frame rate to a crawl.

There’s patches available to fix both of those issues, with no bugs or tradeoffs.