I like a good shooter AND a good RPG, and they are both repetitive to some extent. Shooters are usually just run, shoot, run, shoot, cover, shoot, run, open door, cover, shoot. But you can shoot different people in different places at different times, you need to aim, to time your shot correctly, to choose your weapon, to know whether to use cover, to move, and FINALLY to shoot. You shoot different numbers of different enemies in different environments.
At least, that's what you do in a good shooter.
You usually go quite a while without seeing any enemies in an RPG. When you do see the enemy, however, you definitely have more options. Looking at Oblivion, you can use a dagger, sword (one or two handed), hammer (one or two handed), axe or bow, any of which can be enchanted with anything. You can also use staves with different powers, and different magic attacks, both preset and custom. You can use health potions, mana potions, fatigue potions, intelligence potions, strength potions, and many other kinds, paralysis poisons, health poisons, speed poisons...you get the idea. You ALSO have to decide which enemy to attack and how to move, as well as what armour you are wearing, and what accessories.
So overall, I would say shooters are "more repetitive", but that's not necessarily a bad thing.
(Former) Lead Moderator and (Eternal) VGC Detective 
