I have pretty good taste for f/f, too. I can't watch m/m, though--makes my skin crawl. I'll also be the first to admit that that's hypocritical. Regardless of how hypocritical it is, it's just the way it is for me.
Like Drew, I also am mainly about a good female tickler, and honestly, I often find that better tickling results can be found in f/f than in f/m. It seems that many female ticklers are more playful, lighthearted, and flirty when they tickle guys, but when they tickle girls, they get a little more down to business. For example, a few years ago, Silvercherry got this model named Lucy (and I have sometimes wished she would come back to them, but it's been a few years now, and she has probably moved on to other things). She wasn't super ticklish, so they billed her mainly as a 'ler. She a guy in one of her videos, and she did a good job, but it was a little bit like watching a young woman playfully tickling a boyfriend. However, Lucy was also in at least two f/f videos where she tickled Kandi, and every time, she sent poor Kandi into stratosphere-level hysterics. In one of those videos, Kandi actually reached a point where she screamed out something to the effect of "Oh, would someone please make her stop!"