Swag for one has a sig that doesn't make sense. I mean if musical careers could be bought for money, certain rich artists would be able to sell their albums. :/
Yes. Anything with all females or mostly females, anything with only pop artists, anything with super bad artists (some of them mentioned in the OP), anyone mega devoted to one artist only. Bad taste. And I usually don't care about what they have to say, cause they probably have no clue what they are talking about since their taste is so one-dimensional.
No one cares who you stan for; or at least I don't. So I don't like sigs that are just filled with artists randomly. I like sigs that are anything else probably.