It can be really easy to play the same kind of games over and over again, especially if you're particularly skilled or comfortable with a certain genre. However, this does mean you're seriously missing out on some amazing games out there. You can build your repertoire while also doing the thing you love the most -- GAMING!
If a certain genre seriously doesn't appeal to you, then don't play those games. But if there has been something you have really wanted to play but didn't because you're not used to the genre, then go for it!