2010 or earlier: Meh just another preschool show.
2011-mid-2012: THIS SHOW IS STUPID OMG HOW COULD ANYONE MY AGE WATCH IT (I regret that)
Late 2012-Early 2013: A bit weird that males like that show, oh well.
Mid 2013: It's probably indeed a good show, but I'm afraid that if I watch it, I'll get hooked.
After I became a brony (late 2013-now): I knew it. MLP is indeed the greatest show ever.