This can work for any general...anything you like but because Cheerilee is in the background, I'm just going to put MLP as the example. Of course said example can be twisted to anything popular.
Someone's trying to corner you. They realize that you like My Little Pony, really, really, really love it, and so you sit and wait to see what they're going to do to try to make you hate it. The fans? Unless you're a whiny fourteen-year old, nope. 'IT'S FUR CHILDRENZ'? Nope. 'U CAN'T LIEK WHAT GURLZ LIKE'? Nope.
They keep going through their list of what to say and eventually get down to the most basic thing they can think up of, something that is based so purely on opinion it isn't funny.
"It's a horrible show though! It's so bad, this part of bad, this part is bad, insert horribly constructed criticism here!"
That...isn't going to work.
For one...there is no such thing as a perfect show/comic/movie/piece of media. Every single one, even when looked over by fans, will have at least a few flaws that will be found. Even for shows I hold on high pedestals ( Batman the Animated Series ), I can detect the flaws within them. Even MLP, I did rip some parts to shreds in my critique...
But unless everything's on par with the Garbage Pail Kids movie, which...most things aren't because that's so low on the scale you cannot see it, it isn't going to halt me from liking it. Flaws aren't going to stop me from liking what I like - fuck, I still like InuYasha despite now, being older, I can see what a horrible trainwreck it is. Same goes with the original Pokemon anime.
If you're going to say we shouldn't like it simply because you believe it's bad (it sort of amuses me when people clamour on how about it's so fucking awful when it's actually quite critically acclaimed by a much higher mass of people who have been in the critical field for decades, and most of these people saying it is bad are only going by the basis that they hate the fans)...by that logic we shouldn't be allowed to pour our love into any media. We shouldn't be allowed to really like any single one. So the people who use this excuse - if you really like anything...you better stop now before you start looking like an idiot.
Case in point: no one cares if what they like is bad. The only thing I do really love that I truly believe reeeally isn't that great on a critical scale is Hetalia, but I still fucking love it and no amount of 'BUT THE SHOW ITSELF SUCKS SO BAAAAADLY' will stop me from doing so. Call it a guilty pleasure.
Come up with better excuses, and quick. You guys are running out of good ones...not that you had any to begin with, but you get my point.