The derogatory nature of this term is a bit outdated, back when being really into anime was still not socially accepted (pre 2013). Now-a-days otaku is more meant to be someone who obsesses about anime, cosplaying, manga and is a far more socially accepted term. In fact, most people self identify as otaku.
It usually isn't used as an insult anymore. The internet definition makes it seem really bad and harsh.
ok my list isn't very long so i'm just gonna right it below (none) (none) (none) (none) (none) (none) (none) (none) (none) (none) (none) (none) (none) (none) (none) (none) (none) (none) (none) (none) there's mine