Oblivion Gates are awesome, though it does get a tad annoying when you've eventually gotten bored of them and are then forced to enter several of them for the primary. I remember running without looking back through most of them spamming an Invisibility spell 
I really should go back on it... i was having some good fun with the Oblivion XP mod on top of FCOM so i had a ton of varied enemies to shoot for xp.

I really should go back on it... i was having some good fun with the Oblivion XP mod on top of FCOM so i had a ton of varied enemies to shoot for xp.