I find it extremely odd when someone says they don't like FPS' because they are monotonous and repetitive, this can be said about every single genre of game but is only used in relation to FPS' e.g
(disclaimer: I'm speaking generally)
RPG-Grinding and leveling up experience/weaponry to fight the next enemy with some pointless mini games that are used to try and provide variety but are normally utter rubbish (the whole Chocobo breeding thing)whilst spending most of your time standing still reading dialogue.
platform-get from point A to B with a fair amount of jumping.
Puzzle-solve puzzle A, move to Puzzle B which is slightly harder, get to point K the puzzles change a bit by adding something that makes getting through puzzles take slightly more thought and repeat.
stealth-stand still until baddy goes away.
RTS- resource, build, resource, build, resource, build, attack, resource...
racing- do i really need to explain this one?
FPS-Shoot baddy, here manly dialogue, shoot baddy, slightly characterized teammate dies because he tries to holds of an enemy onslaught by waving around there steroid induced tiny penis, meet the man who killed said teammate and kill him by waving your own steroid induced tiny penis in a slightly more manly way than your deceased teammate until he falls over.
Joking aside, you can see that all games are guilty of repetitiveness and there's nothing wrong with that, and lets face it, if a game came out that was no way repetitve it would probably involve shooting a unicorn then teleporting to the 1800's to play an ultra realistic flying sim then being whisked away after 5 minutes to grind experience by stepping on beetles in Neverland (so basically Wario ware twisted)