I remember seeing something here or elsewhere suggesting that many women like it when a guy trims his pubic hair but not when he shaves it completely. They like their men to look like men, only like neat men.
This is what I prefer as well. I use one of those adjustable hair trimmers that you can buy for $15 or so. You can get them either battry powered or plug in, thought the plug in ones are more powerful. Buz, buz—two seconds and its done! No hassle, no pain. I trim to whatever length and shape I want. I also trim my chest hair. Women really like this!
However, I do shave the hair off my balls. I find this to be very easy and pain free. On occasion, I’ll get a little razor cut. But this is rare and extremely minor. I shave every two to four days or so, when I’m showering. I use soap. Make sure to use a good razor, but not one of those Mach 3 types! Nearly all women have commented on this, and they really like it when the boys are smooth!