Not at all, I'm 27 and I love watching shows like MLP:FiM. I grew up in the late 80s and early 90s watching the classic shows like My little Pony, care bears, transformers, etc. I still watch some of these shows in their current forms. To go back to the question, no disliking myself for watching a television show, regardless of what it is, would not be something I've even considered. No reason.