I like minimalist art, but not when it's too minimal. I don't think a blank canvas should be sold as art, for example. I think some creativity and effort needs to be involved.
I have a soft-spot for cubist art, Mondrian in particular. Abstract, too. But, I like most art - anything from a traditional landscape to graffiti. I'm not a fan of the Damien Hirst half-cow in formaldehyde type-stuff, though.