This is such an odd question. If there's a game that I enjoy without any sense of irony, then I don't consider it bad. People have heaped garbage on me online for apparently having the gall to enjoy games that the vocal consensus has deemed trash. (I've seriously had a lunatic on another forum get at my throat because I like the Final Fantasy XIII trilogy, which this individual apparently found unacceptable on a pathological level.)
On the other hand, I think that the PS2 Ghost in the Shell: Stand Alone Complex game is bad, to say the least, and yet I have a strange appreciation for it despite the fact that I also don't like to play it. I don't hate-play it, or anything like that (said lunatic I mentioned above actually played the entire FFXIII trilogy just so that he could hate it; I wish I was exaggerating). I doubt I'll ever have the will to even finish it because it's so punishing. But it's in a place for me where I'd be totally willing to play it if I were asked, even though I don't really like it.