This might not really be relevant to you but one of my bad habits is that I often feel compelled to respond to people even if it's not entirely necessary. I have to stop myself sometimes, think about what I actually want to say and if it even really needs to be said. I can't say I always succeed, sometimes I just end up sitting looking at the screen for a bit and then feeling silly having wasted my time but I think it's better than posting something I'll regret later (also, sometimes I post things that I regret later).
As an example that comes up fairly often, when someone says they don't like a show that I personally enjoy then I tend to feel compelled to try and convince them that it's great. My first instinct is to wonder why they don't love this awesome thing that I love but then I remember that we're all different and that's (probably) for the best so it's okay to let people stick with their tastes. It's not really about convincing people anyway, if the show itself can't do that then clearly there's some difference in the way we think or our experiences that gives us a different view of the show. I can't say I don't still feel a bit bad about it but, as I see it, it's my responsibility to control that and be fair to others.
I guess if you're trying to convince someone to actually watch something and they're fairly confident they won't like it then it's even worse since they haven't actually tried the show but, again, it's about being reasonable and realistic. People don't have time to watch everything and they have to go with their own feelings on things at times.
I'd say you've had some decent advice in the thread. At least you're willing to hear what people have to say, especially about yourself since that can be a tough topic to try and be objective on (in so far as that's possible anyway).
On an unrelated note, that Himouto gif is awesome and somehow feels kind of appropriate.
