As requested, here are some examples of stuff I printed with my 3D printer.
First example isn't a miniature, but a box with a slide-able lid. It is bigger than the miniatures (the grid under the box is 1" hexes), so apart from some detail on the decorations the quality is smooth enough:
Next example is the "2.5D" miniatures I wrote about earlier. The stirges are not great quality, because they are supposed to be small, and printing small is a problem. However I do like the hippogriff and the giant vulture, both as mounts with a hole in them to place a rider miniature:
Next photo is a bit blurry (I told you I wasn't good at photography), but shows two characters I created with the Desktop Heroes software. They are holding their weapons close to their bodies to avoid problems with printing those:
Larger monsters frequently have to be printed in parts for "flat" printing and then assembled. This manticore was printed in 5 pieces and then glued together with superglue:
Likewise the ankheg is glued together from 5 pieces:
I don't usually paint my figurines, because I'm even worse at that than at photography. However this nothic really required me to paint an eye on to work:
If I print a figurine in one piece, I frequently have to print it with supports. The supports can be removed, but that does leave traces on the base:
Some monsters are ideal for printing, because they don't have fine parts and have a shape with nothing needed to be printed with supports. As an added bonus this ochre jelly can easily be printed in different sizes, for his ability to split into smaller parts when hit:
None of these are of a quality where I would go out and try to sell them. But for a tabletop role-playing game they do quite nicely. A miniature like the spider is unmistakably a spider, regardless from which angle you look at it and under what light conditions. Last night we played a game with a different DM who was using 2D printed miniatures stand-up with bases, but then some of the players around the table automatically end up looking at them sideways, where they can't be told apart.
Let me know what you think, and whether there are questions about specific 3D prints that you have.