I don't mind long games...if there is something to keep me occupied. In Sands of Time for instance, the game was short, but the characters were almost constantly chatting, either providing entertainment or/and exposition.
Runnind 10 minutes or killing the same 3 types of monsters with their ridiculous taunts/death cries (bonus points for bad voices providing bad acting - I'm looking at you, NWN 1), without anyone saying anything worth listening to.