Do it! Haha.
I would say Summer would be a great time to be here. It's warmer, for one, obviously. And there would be more foliage out.
I would say keep an eye on my posts as we have only been here 2 days and we are here for 5 more so plan on doing a variety of things.
Oh, and another thing... Switzerland in general, but definitely Zurich, is very expensive! Everything costs a lot of money.