Sand presents a major problem if you feed in the tank. I never fed mine in the tank, but didn't like the fact that sand bits always got stuck in his nostrils and sometimes underneath a scale or two. Sand boas actually don't live on sand in the wild. It was really cool to smooth the sand over before I went to bed and then get up in the morning and see all his tracks, but it's also cool to see all the burrows he makes in the aspen that I use now.
Kenyans are the most docile snake I have yet to come across. Kyo has never hissed, never coiled, never bitten and lets you pet him on the head and everything. He's such a sweetheart! He's expressive, too. He will actually make it a point to look at you and loves to burrow into my hair and sniff everything.