At Disney I always tipped 20%, which was the discount I got with the DDE card. With the changes to the system and the autogratuity I'm tipping at least 18%, but the past two nights I've tossed in a couple of bucks to bring the total up to at least 20%. If service is just so-so, which rarely happens, then I'd do the 18% and leave it at that. If it was dreadful then I'd speak with a manager. Tonight's dinner at Spoodles was very good, the server gave me a lot of info (about the plan and how it is impacting her, as well as the menu) and she really ran her butt off.
When we go out at home I do at least 15% of the pre-tax amount, and more if I have a really great server who did a good job. We don't go out too much, as I tend to enjoy really good food that is not available in my area. I'm not a foodie but could be one quite easily. (O'Charley's is pretty much the best place to eat in our little town.) I'd rather eat at Panera or Subway than at some of the popular chains. So for me, by not eating out much at home I can justify eating well at Disney.