No, it doesn't stop me from liking Bangel or change my feelings for Buffy and Angel. It actually makes them a more interesting couple, for me, because there is this level of complexity you don't see in other relationships in the show.
Nope. I think, if anything, the presence, or potential, of Angelus makes it more intense. Especially in S2 and S3, there's this sense, to me at least, that Buffy and Angel are about as perfect for one another as any two people can be, but there's always the looming shadow of what might happen if it goes off the rails lurking over them.
Call me a girl, but I like me some angst in my relationships (well, T.V. relationships...although, come to think of it, angst might be the perfect word for my real life ones as well. Huh. And people wonder why I connect so much with Buffy and Angel. Okay, rant/inner monologue over 🙂). Or at least, well-written angst, and I think that was always the case with Bangel.
And like Cordy said, they have pretty much the forbidden love of all time. So whenever they do manage to hook up, whether it's in "Surprise" or "I will remember you" or any of the dream sequences they have, I don't think anyone else has the passion they do. I'm well aware of how this sounds, but in part because it's so forbidden, Buffy and Angel have, by far, the hottest ship' on the show.
I'm not arguing against Bangel here but Buffy never knew Angel the man, he always had the demon in him (except in the Angel episode IWRY), his soul meant that being evil caused him a lot of pain, to the point that he turned good, but Angelus and Angel - though "different people" for the purposes of the show(s) - are really the same, except that in one state he has a conscience (soul) and curbs his wrong-doings. Granted that's a big difference and I would never blame Angel for Angelus' actions or laud Angelus for Angel's, but for me although the show presents them as different to make things easier to process, they are one and the same. An analogy would be Willow and Dark Willow, they're the same person but one is "evil" and one is not (though I must add that lately I've realised I have a problem with that particular dichotomy, which I'm sure I'll go into another time and in a more relevant thread when I've had more time to think on it).