Final Fantasy 8 as a kid- Used summons the whole game, never upgraded equipment or drained spells. Totally gimped myself on disk 4.
Chrono Cross as a kid- Made it all the way to the Isle of the Damned as Lynx before upgrading any weapons.
Final Fantasy IX- Never used a single weapon long enough to retain their abilities.
Turok 1 and 2- Played exclusivly using cheat codes.
Oh and here is some bonus content...Metal Gear Solid, first game in the franchise I played. Put my friend to sleep when he was staying over because I wanted to "beat the first mission" before we switched to a multiplayer game.
Funny thing is, aside from FF8, I beat all of those games playing it wrong. Most of these are JRPGs...hard to believe I almost specialize in them now lol.