I hope this doesn't seem like a dumb question, but how do you reheat food?

I'm a pretty good cook, and since I'm only cooking for one or two, I frequyently have leftovers. I'd like to freeze them and save them for later, but when I microwave them later, they always seem pretty shapeless and textureless and generally yucky.

I've invested in good quality freezer ware, but it doesn't seem to help. I have no trouble with other things I freeze in bulk. (Unccoked chicken or pork, spahgetti sauce) but I can't seem to re-serve prepared foods.

Any suggetions on how I can reheat frozen food so that it's something I'd be willing to serve guests?