Depends where I am - Back home, i'll walk. It's close enough to walk and the streets I have to walk are not dangerous.
At Uni (In Nottingham), I get a taxi/bus, unless i'm in the area where I live already. I used to happily walk (it's about an hour's walk, so not terrible. I don't drink though so I would be feeling the cold the whole way through) until my housemate came back one night after walking home from Ocean. He'd had a bag full of ****e thrown at him by some chavs and was covered in it for about 45 minutes. The police wouldn't help him when he bumped into some at a petrol station (he was hammered and covered in ****e, what would you do?) and he ended up throwing up several times before getting home.
He had a quick shower and went to put his clothes in the washing machine. His hands were full so had the wahsing up tablet in his mouth. It exploded. I had to help him get checked out medically throughout the night.
So no, we get taxis in Nottingham.