Who told you they weren't friendly? These are the most docile snakes I have ever had. The kenyans are more docile than the roughscale, but most roughscales are super sweet too.
They sometimes go on fasts (like BPs) but they always will eat again. They're real easy keepers.. just get a well started baby, and you'll do fine. I LOVE my sand boas. I know a fabulous breeder if you decide you want to get one.