All of the Time Splitters games. All of the Baldur's Gate games (they are GREAT fun multi-player), all of the Ever Quest Legend games (basically bgate enhanced). Then you've got some great fighting games (Tekken Tag), all of the SSX games (they are all brilliant, but I still love SSX 3 the most), the first ATV game is great fun (the second sucked, as does ATV vs. MX). Also for "cute" style puzzle fun Kuri Kuri Mix is *awesome* - you'll need to ebay it, it's rare now, but SO much fun. Oh and Worms Blast, Puzzle Bobble, Puyo Puyo Mix and most of the games in the Capcom Classics collections
Enough for you?