Let's keep the question train going, shall we?
Today, I answer Corky's question of whether or not I display my cards.
Spoiler: the answer now is no. (TL:DR at the bottom.)
Short story long: (if we say long story short, why not short story long to mean an overly descriptive story?)
As a kid, I didn't really display my cards. My first cards were rubber-cemented to some thin poster board and then stored under my bed. Those "posters" could have been displayed for a while, but it couldn't have been for too long. As I got into collecting and had more than a couple packs worth of cards, I had a few souvenirs on a shelf, but my cards stayed in a box or binder when I wasn't sorting, studying, or just flipping through them. Yup, all those originally-mint-condition '89 Donruss cards got their corners softened as I got to know the players on each team. I eventually turned the tiny closet in my tiny bedroom into a baseball shrine... a boy's man cave of sorts. But I don't think I ever displayed cards there; the wall space was reserved for posters and newspaper clippings.
When we moved across the country, I got myself a normal-sized bedroom and an unfinished half-basement to call my own full-size man cave. I ended up getting two showcases which I used to display a few cards and small souvenirs, and little shelves for my bigger souvenirs. I must have had one or two of those cheap wall-hanging 30-card displays at some point. But for the most part, my cards stayed in binders or boxes. I lost my bedroom when the basement was finished; the basement was both my bedroom and man-cave. So I had less space to do something like display cards.
Eventually I stopped collecting in college, and when I came back into the hobby I didn't display any of my collection for quite a while. Even when I moved into my own two bedroom apartment I kept the cards stored away. Some of my souvenirs found their way onto shelves, but I don't recall displaying cards.
I then moved into a loft which had lots of open space. This was perfect for setting up shelving to display my collections. And again the cards stayed in storage - binders or boxes that could be looked through but no cards on display to look at. However, once I got my Nolan Ryan and Ken Griffey Jr. autographs, I had a desire to have them on display. So I put them on shelves with figures of those players. I did the same with a Tony Gwynn autograph I had.
I still have that Wheaties box, and it still has its cereal. And those bats are all game-used cracked bats I picked up at minor league games. If you look closely at the shelves, you'll see there's only one team on each shelf. I was very happy to have the space to do that, though the Indians shelf is quite sparse, with only a cross-stitch logo my mom made for me.
I have some uncut sheets, which I put on display too. About 15 years ago, when all kinds of crazy relics were coming out, I used some snap cases and magnet tape to display some cards on the breaker door on my wall. It was pretty poorly located - right in the eyeline of someone first looking in the apartment - so covering it with cards was an attempt to make it look better. I suppose I could have put one of those uncut sheets over it, or some poster. Regardless, there weren't many cards on display even though I had tons of cheap souvenirs on cheap Ikea shelving.
But when I moved back to California, everything went into storage, and while living in SF I didn't display any cards. I brought one cheap card from every Topps, Donruss, Fleer, Score, and Upper Deck set with me when I moved to Japan, and I used removable double-sided tape to display them along the top of my wall, like a border.
Unfortunately, when I moved out of that apartment, anything I had on display was packed away, and while I now have a couple figures on a small shelf, my apartment is essentially devoid of any decorating or personalization. I still have all of those cards, and some day I may take the time and effort to line them up along the wall of my current apartment.
How about the future? One thing I would really like to do is to frame the roller coaster cabinet cards from 2012 Allen & Ginter and display those on a wall. It combines two of my favorite interests into one little attractive package. I would like to display uncut sheets along a wall. And I would love to have a little display for each of my player collections - perhaps a representative card alongside the player's bobblehead or other figure.
So long story short: no, I don't display my cards now. I used to have a few on display, and I'd love to do it again!