Is there a reason to pick a jungler besides Lee?

is better than Lee for many team comps and is much easier to play.

Honestly, jungle balance is super sketchy right now.

Never AND I MEAN NEVER FORGET TO BAN LEE.

If you like playing other junglers then yes.

Lee Sin doesn't work in some compositions.

I like amumu, at least in bronze silver I can out trade almost every lee sin I face, unless they build straight damage, in which case we win team fights pretty easy.

Eve is pretty strong right now with the E buffs.

is greatest jungler of them all.

Because not everyone can use Lee that well. I'd rather see someone pick a lowered tier jungle because chances are, they can actually use them. I don't need to see more people try and fail at using Lee because they heard how OP he is.

News flash: Strength =/= ease of use.

J4 is about as strong as Lee in different ways. I would say J4 is the defensive version of Lee

K6 does a lot more damage and deletes anybody

Vi is stronger than Lee but with less mobility

There are some reasons.

1. Your team has no ap. If this is the case, it'd be better to pick a jungler than can do more magic damage than Lee.
2. You're better with a different champion. Even if Lee is stronger than some other champion this alone can make some other champion your best chance of winning.
3. You don't own Lee Sin.
4. Someone else works better with your team comp.
5. Someone else on your team will feed if you play Lee Sin. Not likely, but it could happen.
6. Your opponents do not know how to deal with some other champion as well as they can Lee Sin. I wouldn't count on this one though, unless you somehow know your opponents that well.

nunu and shaco so they can steal all your buffs and run away