I have only found Dutch subtitles a few times, so I always watch everything in English. I've seen some episodes of Heartstrings with Dutch subtitles, it cracked me up. I have watched some episodes of KPOP utlimate audition with German subtitles for fun too. (and because I had a German exam coming) If I really need to watch something, I'll even go without subtitles if needed, that's just for Japanese though, I'm not fluent enough in the other languages...