Hah, I’ve never gotten a bobblehead because I always use external ship view. I was today years old when I learned that they had a mechanical benefit.
I spend my quicksilver on building parts. I’ve gotten the few cosmetics for my traveler and ship that I need, but I really like having artwork on my base walls, so I buy all the posters.
Mostly just: target walls. I often then put a florescent tube light – scaled down and rotated on the long axis – right above the poster to give it a gallery-like lighting effect.
Sometimes, depending on wall-building wonkiness, certain posters will clip through. Best thing I can suggest then is to put two flat-panels on the wall, overlapping and scaled down to just larger than you want your poster to be, then put the poster on top of those. Gives a nice “frame” effect. Buuuuuut that can be wonky too, and some posters will sometimes clip through the flat panels, for Reasons known only to HG.
Alternately, sometimes you can put a second poster on top of where the clipped one went, and that will stack enough that the second one sits “one top” of the wall.