If you want to get a real challenge, then actually roleplay your stats.
No wise comments, and only give the "stupid" responses. Also, limit your tactics to more "straight ahead" (i.e. charge in) tactics.
How about this for another challenge: solo sorcerer with the following spell selections
1: armor, friends, infravision, reflected image, sleep
2: deafness, ghoul touch, know alignment, luck, power word sleep
3: clairvoyance, hold undead, non-detection, protection from cold, protection from fire
4: contagion, enchanted weapon, farsight, Otiluke's resilient sphere, remove curse
5: conjure lesser air elemental, conjure lesser fire elemental, conjure lesser earth elemental, protection from acid, protection from electricity
6: carrion summons, conjure air elemental, conjure earth elemental, conjure fire elemental, stone to flesh, wyvern call
7: cacofiend, control undead, mass invisibility, prismatic spray, sphere of chaos
8: maze, power word blind, summon fiend, symbol death, symbol fear, symbol stun
9: energy drain, freedom, gate, imprisonment, power word kill
Just a suggestion!