It really depends on the service I am getting, the length of stay, whether I am in a
DVC resort or not, etc. My view on tipping is that it has become too routine with little thought or sense of appreciation.
If it is the custom, then I tip according to the service provided (not the meal quality or room location or other factors the service provider has no control over). If it is not the custom to tip, I may anyway, if the service is beyond normal job duties/expectations -- ie it is clear that someone has extended a special courtesy or gone out of their way to assist me.
I say goodday to the staff, by name, whenever I see them. Some folks treat them like they are invisible. And I find a few kind words, a short conversation, and using their names can go much further than a few dollar bills.
Hand written thank-yous are especially well thought of because it is rare today when much of our communication is by e-mail. I also commend their service to management. Those are usually by e-mail, but when the courtesy is extreme, I will hand write to management as well.