I'm only posting Grassblades-stuff on Tapastic right now, but yes, I do juggle different genres of comics all the time.
I did two scifi oneshots over the summer - one for an anthology, the other for a competition - and I'm currently working on a Christmas-calendar type comic. I wrapped up a romance oneshot in during the summer as well.
Most of my stories tend to fall somewhere in the speculative-fiction-and-adventure side of the scale, but I do dip my toes into other genres as well. I've got ideas for a bunch of stories other than Grassblades, in all kinds of genres, which I hope to get to some day - and they stretch from the familiar adventure-territory all the way through gag-strips to low-key dramas in modern settings.
I might feel most at home in fantasy-adventure stories, but I've never been the kind to stick to just one genre when I have infinite possibilities.