I will admit that I proudly and unironically call myself a member of the PC master race. I do it tongue-in-cheek of course, since it is a joke, but I am a PC enthusiast who truly believes that a PC is the best platform on which to play games. I read the subreddit sometimes, although it gets a bit much at times, but I personally like the term because it encapsulated how many PC enthusiasts feel, that the PC is without a doubt the best way to game.
I don't go out of my way to criticize people for playing games on consoles, I will play on my buddy's WiiU when I go to his house. I don't think there is anything wrong with owning consoles or playing games on consoles, I just happen to think PCs are better. I work in IT, I love computers, so that is probably part of it. I love to select the best components in my price range, build my rig to be blazing fast in games and in general, for me it is a great hobby.
So I will continue to call myself "PC master race", word police be damned. I don't want to go out of my way to insult or offend anyone, I would never call myself part of the "PC ban Muslims race", but I given the context and welcoming nature of the PC community I don't think PC master race rises to a level of offensiveness that would cause me not to identify that way.