I can understand disliking Snape. Personally, I don't consider him to be "redeemed" either. He was still a bad guy; he just bond himself to the good guys. I just enjoy complex villains. I would also be lying if I didn't admit that I adore Alan Rickman's portrayal of the character, which increases the character appeal.

Since you commented, I'm giving you fandoms. Not that you have to do the meme, if you don't want to. :)

Star Trek
X-men
Harry Potter
Star Wars