Pretty much agree with everyone regarding the fact that space becomes a premium, and it sounds like many are like me and will eventually run out of space. So I do my own European mounts generally vs more shoulder mounts. I did the whitetail deer shoulder mount down in my sin cellar, I did the antelope in my living room and the blacktail buck in my entryway, I also did the badger in my sin cellar too, but it's a lot of work and I don't always have the time anymore.
I always wanted a Marlin on the wall, then when I caught some the fact was that I simply don't have the wall space, so I take pictures to capture the moments. Sane with bears.. I always wanted a bear skin rug in every color phase of the black bear on display in my house, but those rugs take up a lot of space and despite being blonde or chocolate or cinnamon it's still a bear skin and is just one type of art, no variety so I eventually nixed the idea.
Many of my greatest hunting moments came not from the harvest, even if it was an exceptional creature, it came from sharing the moment with a close friend or family member. It gave the moment special meaning. Because of that I've dedicated one wall (near Shifty's Wetspot Bar downstairs) to just pictures of my friends and family and I enjoying just such adventures.
Even guests that do not hunt or fish love looking at those photos but it captures something that they can relate to and identify with... Then after seeing those photos, the horror of walking into my abode which looks like a recreation of Noah's Ark crash landing and the various species of animals have been restored in various poses all over the house, becomes a little less hard to appreciate.
I have a "museum of flight" wall with several species of upland birds, not taken from around the world, but form my corner of the world here in Washington.
I have another opposite the birds with various salmon species taken also from WA.
Above the downstairs fireplace I have a 48 inch Northern Pike mounted, my largest and it was caught during a week long trip I was invited to attend hosted by the Sportsman's Channel up in northern Saskatchewan, for a regular guy like me, that trip would have never been affordable or ever happened, simply because it's cost prohibitive and I have other priorities. But when they invited me (all expenses paid) I suspect for the campfire camaraderie and laughs that I brought, I couldn't turn it down. But that's one of the only guided trips I've ever done. I've hunted and fished around the US, but it's always been DIY, on public access (usually wilderness or back country public lands).
