There must be a big variation in the stores. The stuff at my PetSmart all looks horribly tacky to me, makes me depressed. I did search online to see some of the 3D pictures of rocks talked about in this thread and did see some that looked great, just didn't find them easily available to me where I am in US, maybe that's it.
Sometimes the internet, with its ability to find pictures and bring you the "best of the best" can be both exciting and depressing. Right now for me its depressing. Right here on TFF there are so many gorgeous tanks and my son's plain little tank is just nowhere near that level of artful sophistication. I've got great water but a really "nothing-special" aquascape so far (those of you who know my posts wouldn't be surprised by this, lol.)
Well, I've gotta get myself off of here and go cut my black background!!
~~waterdrop~~
edit update: Wow, I can't believe how perfectly this worked. The flat black foamboard from the art shop was 3/16" thick and that turned out to be the exact thickness of the black plastic rims that fit to the top and bottom of the marineland tanks. So when I slid the foamboard along the back glass behind the filter tubes and electrical wires it then just fitted tightly between these top and bottom rims and they hold it in place without any tape or clips or anything. So now at least I have a flat back background with everything hidden outside the tank and the attention goes back to the fish and plants. The art sheet was even big enough so I cut two of them for the day when the first one gets wet. This will buy me some months to think if I want a real background like you guys have.