Using Plastic 3d printing for robot parts

[WilkinsMicawber]

Plexiglass/Acrylic is my go-to robot chasis-building material, but it is near-impossible to make round objects with plexiglass. I'm thinking of purchasing a 3d printer, but from what I can see in pictures, 3d printed objects have a very particular texture and appearance that seems native to 3d printed objects. I'm not sure whether such is desirable for my projects. I would like to attain a very smooth, glossy, and professional appearance. I have never been able to touch a 3d printed object, so I'm trying to gather some impressions from people who have some printing experience.

Has anyone here printed parts for robots?

Can anyone comment as to how 3d printed parts would compare to plexiglass in terms of feasible texture and/or appearance?

Particular filament recommendations?

Thank you.