I like testing out the various housing items to see what can fit together well, aside from placing NPCs at computers, bars, and tables. The Rakata Mind Trap in the middle of the Jedi Fountain is a good combination.; crystals also work really well.
A guildmate placed a datacron just right inside of a Selkath Medical Tank that it looked like it was on fire or something, pretty cool effect. I have a datacron in the center of one of those arrangements you buy from Felusia, it could be better but I like it.
The datacron table in my little casino lounge.
Another guildmate had table dancers at his Tatooine home (apparently I didn't take screenshots for some reason) and I've had Rakliings on top of my Science Station, as well as the Small Holo Table in the center of it. The guildmate who did the burning Selkath Tank has had Flutterplumes inside of medical tanks and a Manka Cat on his bed. Just a bunch of things you can do if you think about it. I saw one person post on the SWTOR forums examples of art they make out of the story mode trophies, really great stuff that I never thought of (because I have an obsession with banners anyway) but I have rotated the 'Pub Voss Embassy Sign to make it a bit different.
Anyway, I had a couple of those awesome Sculptural Fountains and when I ended up getting my Spores, I knew exactly what I wanted to try and I quite like the result. So here are some screenshots of my fountains, fungi, and fungal fountains.
Bloom versus no bloom
The fountains after I got them set up and before I got the fungi.
One of the fountains after I added the glowing spores to see what it looked like.
A spore fountain in my DK home, fave of all the homes but so inconvenient for my 'Pub scum (and friends).
Both Nar Shaddaa fountains with fungus, also with all graphics at max.