The most enjoyable was a group that only used non-enchanted items (ie. normal weapons and armour), which forced me to use otherwise useless spells like Enchanted Weapon. Also did a few solos but they get boring fast. I prefer full parties so they level slower and there is lots of party banter (that also means no MP parties).
I've been trying to come up with some new, fun ideas but have been largely unsuccessful. Tried a group of pacifists that used spells to turn monsters on each other and used lots of summons to do the killing for them, but it got really annoying, really fast
Could really use some fresh ideas.