So I was wondering what your bases look like, and what you put in them, and stuff like that.

In my base I have flowers in it, because they look nice. I used to have this weird array of TVs, 12 of them lined up 3*4 style.

You can never have enough televisions.

Mine is currently filled with rocks, with just a couch & a single televison.
I never really bothered with a base in the 4th gen, I miss my old R/S base to much.

Mine is currently full of stuffed Pokémon plushies.

Even though I have the highest level of captures, I actually left some rocks in my base as decor. It has a TV and computer on the top end, a lounge to the left, and a kitchen to the right. I think the design's pretty cool, although I'd like to replace it with a maze at some point.

I used to decorate my base a lot with refrigerator, television, etc., but I lost interest in it now.

Mine is full of traps so nobody could get to my flag...muhahaha

I cleared away most of the rocks by capturing opponents' flags, so now I have a vast base. I put a lot of dolls, tables, chairs, cushions, as well as a number of expensive things including a refrigerator in it.

4th gen base: just stuck random stuff all over.

3rd gen, I was big into making bases. I had one in nearly every game of that generation through each play. I swapped with so many players that I must have at least 20 bases (not including all those they swapped with!) hidden throughout Hoenn that I haven't bothered looking for yet.

Anyway, here are a few of them:
Sapphire: simple little maze, moved around a few times to different areas to get larger spaces, currently has some of the specialty wares like the mud statue, door, and tire.
Ruby (play 1): lots of music notes and other floor tiles.
Ruby (play 2): posters, tables, chairs.
Ruby (play 3): got creative with more "advanced" pieces, including slide.
Ruby (current): on loan to a friend, no idea if he has a base.
Emerald: I forgot.
Emerald JP: doesn't have one yet.

I remember me and my cousin got really into the Underground for awhile, so I have some pretty sweet L00t. I have all five master contest cups, a giant globe, a pokemon gym statue, a bed, a snorlax doll, a wailord doll, a mudkip doll (of course) and a wobbuffet doll. I also have three of those giant gemstones from stealing people's flags. The red, green, and yellow ones. I also kept some rocks as decorations.

Diamond: (platinum status) See picture below.

Platinum: Don't have one (not interested)

1 attached image

My Diamond base was awesome before I got stuck in the void ¬_¬
It was platinum status, and had loads of expensive and rare stuff in it.