It's never to much, if that's what you like.  Every once in a while when I post an image with some creative filters applied, someone posts a comment that they don't care for taking nature, and as this person said, "brushed and photoshopped to be more beautiful".  I've posted nature photos with lots of post processing and gotten great reviews, so no matter what you do, someone is going to take issue with your artistic style, but that's ok, just keep doing what you like.

Here is a sunflower that I applied some creative filters to, and I think it looks pretty cool.