Significant Others and what they do

I know this sounds corny and totally sappy, but what are some sweet things that your boyfriend/girlfriend do for you? Or don't do that you wish they would? They can be really simple like giving you a little handmade gift or something big and extravagant such as a fancy dinner to make you remember exactly why you fell in love with them in the first place. Or things that just make you melt in general? (mine is when my bf sings When You Can't Sleep At Night by OM&M to me :D). And at the opposite end of things, what are some things that they do that drives you nuts?