While I'm not a huge fan of RPGs, Pokemon is a mainstay for me like everyone else. I quite enjoyed the prospect of raising my own "pets" and battling them against others when I was younger, though I play it more tactically and in depth than I should be instead of having fun these days. :^]...
For me, it would have to be the delightful anime, "A Sister's All You Need". Watched the anime, read the manga, loved the light novel. Granted, it's not afraid to flaunt how over the top the fanservice can get; I'm sure the ones that have watched the first minute of the first episode will agree...