I do like the feel of rubber fingergrooves, maybe more than checkering, but IMO first and foremost it's a matter of class. A nice tuned up 1911 just has to have checkering. Rubber can get clingy to your clothes, some say checkering will wear holes in them (I cant imagine how they get that much contact with the front strap in any type of carry rig)
My first pistol was a Ruger P-95 and I put one of those Hogue slip-on finger grooved grips and it helped a LOT. Even steel framed Rugers due to grip aesthetics really need a finger grooved setup.
I read an article in a gun mag a few years back on alternatives to checkering, custom stuff. I'll try to find the article, there wre a few interesting options out there. One I liked was deep, wide, wavy veritcal grooves, looked really nice. Another had like these raised square bumps, that gave it the texture similar to a pineapple grenade.