Well

I love Touhou music. Many, many, many others do too. I know of the big names, TAMUSIC for classics, CROW'S CLAW (or well, anything...Demetori anyone? =Neutral= is pretty awesome too. There are lots for this genre) for metal, C-CLAYS for vocals, and I personally absolutely eat up Liz Triangle stuff. Countless other circles I did not name too! (Touhou is the first time I actually can name albums and like artists/circles and such, previously my interest in remembering song names and actually bothering to listen to them were slim to none. Then TOUHOU!)

But I've never really had a proper favourite circle or anything like that. I just listen to all the music, no matter what circle is. One day my Youtube recommendations which is usually filled with Touhou music (among stuff like LoL vids, DBZ scenes [because they're entertaining to watch!], South Park clips, and random videos of feeding wasps (just because I clicked on one vid of it o_o) ) I clicked on one and enjoyed the song. It helped that the picture was one of badass Nue. But then I listened to MORE of the same circle, and a lot of the songs were really good! I also had never heard of them before, so I figure I might as well throw it in one of my favourites. Something that sticks out from all of the circles everyone knows of. Aoi-dono is like that for Scarlatto di Levante.

Anyway, this circle is called MAD TEA PARTY. I've only listened to their GODMOTHER album so far. I guess from the names you could guess they're metal or something, but I surprisingly heard classical, metal, electronic (and a mix of them all o_O) in that single album! It was somewhat refreshing because I was listening to Touhou piano earlier and for some reason was like "blah I don't fee like piano =_=" and then I find this pretty cool circle. P: (It appears they only have one album? D: I WANT MOOOOAR)

Mmmm. Heian Alien.
Underrated circles go! (And underrated songs! WE NEED MORE CENTENNIAL FESTIVAL FOR MAGICAL GIRLS!)