Classic checkering is very nice looking if done correctly. 20-30 lpi (Lines Per Inch) is the norm. 20lpi will be a rougher feel to it than 30lpi and the 20 will normally give you a more positive grip on the firearm.
The golfballing technique also gives a great grip on the firearm and also looks fantastic.
Stippling is ugly, but it works. Probably the grippyest (If that's a word...) front strap out there for a working mans 1911.
I have never held a 1911 with either the vertical grooves or the square milling on it. I could comment but that would just be silly.
Personally, I carry a 1911 with a smooth front strap. I have never felt like the firearm was going to slip out of my hand due to the smooth front strap. Therefore, I would pick the one that looked the best IMO (If you just had to have it)...
For me, it would be the golfballing technique. (3rd picture down..)