I like both, but I've always leaned toward science fiction myself. I have an easier time finding deep and thought-provoking stories in the science fiction genre, and I tend to prefer its more emphasis on exploring what its possibilities mean and using them to examine ourselves.
My beef with the "sci-fi only! No fantasy" people I've known and met IRL is they are often preoccupied with a power fantasy of sorts. The ones I knew didn't care about story or themes as much as "wow killer invincible weapon how many gigatons can it do" technical details. It put me off from trying some sci-fi series entirely.
Funny enough, I actually gravitate toward sci-fi for the opposite reason. Ordinary, working-class protagonists like Redrick Schuhart and Ellen Ripley always resonated more with me than any chosen hero with a special magic sword ever did.
Oh, I love those stories too. I mean the kind of stories that "fantasy sucks" absolutists that I met were into, that were more about how awesome the weapon technology was than anything character related.