If you want to rice your desktop, I suggest you use rainmeter only to a certain degree.
If you'd like a visual style (The themes you're talking about); I could suggest you a few.
Windows 7:
-Deshou VS by a good friend that goes by Rav, you should check out his Deshou suite. He has steam, VS, and more. Check out his visual style here:
http://ravmunken.deviantart.com/art/Deshou-VS-394841179
-Pix_VS by another good friend that goes by twnsnd. It's a great VS, and I'm sure you'll like it. Link:
http://twnsnd.deviantart.com/art/pix-vis...-387473819
-Anomaly VS by Kamaz. I don't know this person, but he has some great VS's. Link:
http://ravmunken.deviantart.com/art/Anom...-393485077
Windows 8:
-Penumbra 8 for 8 and 8.1 by scope10, another good friend of mine. He makes a shitload of wallpapers, phone stuffs, and all at his deviantart. Check out his VS here:
http://scope10.deviantart.com/art/Penumb...-413733974
-Appows 2014 for 8 and 8.1 by neiio. I used to use this VS for a while, and I'd say it's really great. Link:
http://neiio.deviantart.com/art/APPOWS-2014-426085198
-Base for Windows 8 and 8.1 by link6155, Great for gradient backgrounds/color schemes. Fits well with non solid colored backgrounds. Link:
http://link6155.deviantart.com/art/Base-...-358462823
-WhiteDior for Windows 8 and 8.1 by RidKurn. Amazing VS I used for almost a half a year. Great for solid color backgrounds, and fits well with almost anything. Link:
http://ridkurn.deviantart.com/art/UPDATE...-361644703
If you'd like any help, feel free to contact me.