I totally agree. I am a racquet junkie, and rotate between several racquets depending on my mood, and I have to say I don't like leather on all of my racquets. I like leather on the square shaped grips, like Prince, and Yonex, but I prefer synthetic on more rectangular grips like Tecnifibre and Head. I also like my racquets slightly more headlight than stock, which the leather grip helps with nicely without having to add lead to the handle.But, like Backhand Compliment said, I prefer the feel of leather on most racquets at the net and on serve, especially around the net. Sometimes I add a thick leather grip if I am feeling like a grip size might be too small, just to see what a slightly larger grip would feel like on a stick, before I (semi-) permanantly build it up with a heat shrink sleeve. Leather grips are also more durable than most synthetics. I've got a couple of old woodies than have the original leather, and I use them all the time without and overgrip. But, in serious match play, I always use and overgrip because I sweat too much.
Right now, I have been enjoying the Head Leather, they aren't too thick or too heavy and have been super consistent. TW's house brand are pretty good too, but I find them less tacky and stretchy than the Heads. Over the years I would often try Gamma and Pro Supex, because they are a few bucks cheaper than most other brands, but I always found them too bulky. Never bought Babolat or Wilson and installed them myself, but I've played with them and they good grips, I would say on par with the head grips I like, if not just a tad firmer feeling.
When I opt for a synthetic base grip, I usually go for something firm like Gamma Hi-Tec or Tourna Pro Thin