What are some fun playthrough rules you've tried?

I'm currently playing through the Sith warrior story line, RP-ing myself as extremely overconfident, but with the lightsaber skills to back it up (at least for now, just starting Ch2). As such I'm playing my favorite class, marauder, but only ever using one lightsaber. At first I considered the approach "I'll only draw my second blade for worthy foes", but then I defeated Revan with one blade, so I won't draw it until I lose a duel.

I'm also planning to start a Jedi Consular who will not be drawing their lightsaber at all (if possible). Still working on the details as to why, but right now it's in the directon of "a jedi should'nt need a lightsaber to resolve conflicts, the force the only ally I need", possibly wiht a slight DS touch of "lightsaber? The force is my weapon".

Have you ever done a playthough like this, where you've purposly restricted yourself in some way? Or have you done other rules additions for a more fun, interesting and/or challenging playthrough?