I Thought about way before joining mlp fandom. It's a question I've always asked to myself. Why am I doing this, why can't I just be normal ? About work, about my personality, about everything I do in general.
But you what friend ? This question, it's bullshit man. What are we doing with our life is our own business, and if you think that you're wasting your time, well, quit and move on to something else, nobody forced you to be here. The thing is...you said that to yourself because you see that every body is not doing it, so maybe you just thought that, I don't know it was not normal or something like that.
Don't think that the norm, is the normality, you're a ponyfan, it may no be forever sure but, if it makes you happy, well go for it. And you'll be old, ( Granny Smoth style), you'll speak to yourself and say "man that was really good old time !"