How awful would I be if I quit a job the same week I got my Christmas bonus?

Naw, man, not awful at all. Any company would fire you in a second if it benefited them. They deserve exactly the same treatment. A bonus in this and in most cases is something paid for work already done anyway.

I quit a job where I’d just vested and just received a large bonus (enough to buy a lower-end car) with no regrets. Was even invited to come back anytime to work there as they were professionals at least. Companies should be treated exactly as they would treat you — no better, no worse.

It’s the only sane way to conduct yourself.