I don't if most supervisors dislike students taking holidays: one of mine does (see my previous post), but the others are OK.
The one who disapproves of holidays is actually retired but still comes in 8-5 every day. But he reads the paper from cover to cover, then makes tea, then reads a few emails. So when he tells me that holidays are unnecessary, I take it with a pinch of salt. I wouldn't be bothered about a break if I read the paper all day long, either!