No, I don't. I feel better, refreshed, and ready for what the rest of the day may have to throw at me. It possibly helps that I am something of a night owl, anyway, and a nap arms me for a nocturnal spell of work, if circumstances call for it.
Actually, I'm a big fan of the rejuvenating qualities of a short (or long) nap. However, up until my early twenties, I thought the whole idea inexplicable.
Then, one summer while working abroad in my student days, I had a job which required a 6 a.m. start which was horribly incompatible with the all night partying some of us were prone to in those days.
Afternoon naps became not something inexplicable indulged in by the terminally aged, but an absolute necessity if one was to have a social life and a paying job. Overnight, I became a big believer in the restorative properties of the afternoon, or early evening nap.