I gots:
Mystical Chain: Was really fun, kind of lacks replay value though. Difficulty is also pretty inconsistent. The production quality and music of this game is really obscene though.
Touhou Labyrinth: Seriously, this game is so amazing to me. Never have I ever seen a game with a perfect blend of challenge, balance, and variety (of characters to use, possible party makeups, enemies and bosses to fight, etc). The unique take on SP, focus, and spells adds a huge level of depth to strategy in combat, no more spamming fight/casting ultima/flare/elemental weakness/whatever over and over, thank goodness.
Touhou Labyrinth + disk: Unfortunately fails to meet the quality of Touhou Labyrinth in almost every catagory. Only 2 new tracks over the course of 10 floors, 1 page of characters, very plain and often uselessly itemized equipment, just plain WEIRD looking enemy art compared to before (regular mobs, bosses look fine), and no balance in terms of level requirements for each floor...Oh, and pretty boring boss fights, pretty much everything is a tired old "get to 20% health then 1shot the party on my next move after I cast focus" boss.
I'm TOTALLY looking forward to the special disk *Pokes Forza* Didja get it yet? huh huh didja huh? huh?!?! >=P
Gensokyo Tower Defense: The best Tower D game I've played. The selection of towers is greater than any other TD game I've played except for the elemental type ones where you mix em or whatever. But those ones tend to lack balance and just have 1 formula you can abuse for the whole game so whatever. The danmaku in it is also pretty. I mean you actually danmaku the enemies down. None of that bullets/lasers/rockets shooting straight all the time nonsense. It also involves more strategy in tower placement in maze shapes since the danmaku tends to act a certain way other than just shooting straight.
The selection of maps, along with the map editor (which I can't get to work unfortunately) also is great. It also has a relatively wide selection of difficulty settings, and is the ONLY TD game that is designed to be non-juggleable (I hate juggling) that I STILL cant beat on its hardest settings...Unfortunately I'm wondering if the 100 is even possible without Aya. It's considered extra though so it might not really be intended to be *shrugs*.
Touhou Disgaea: To be honest I haven't played it much because I heard about a translation project for it and am just waiting patiently for it.
Touhou Pocket Wars Evo: I haven't played this as much as I'd like to since I'm working on a translation patch for it myself. It's really close to being complete though so soooooon. So far t hough it seems like a great game to play while doing other things, lurking IRC, whatever. Doesn't need quite the same level of attention as most games. The whole remake thing really adds a level of replay value that's really impressive, kinda like disgaea! I can't wait till I have a whole whack of multi-remade characters owning up phantasm opponents.
Touhou Soccer 2: You know I really was having fun with this game but I stopped cold-turkey at some point. It was pretty fun though, and travel mode looked like it offered some pretty good replay value too. Not awesome amounts, but a pretty good amount. My only beef was that the AI was pretty tedious sometimes. It was very predictable, and most often just plain exploitable, and yet sometimes it could own you by sheer cheating (impossible to intercept one-twos over and over straight to your goal with some super shot that cost them no guts at all, yeahhh...)
Fushigi no Gensokyo: I haven't really played this guy because I can't read Japanese, and it's not fun without being able to understand anything. I mean the gameplay isn't really story-based but it's a rogue-like..and roguelikes tend to be especially exciting because of all the random loot drops which are absolutely key for survival sometimes. But every piece of loot just makes me wonder "wtf is that". And alt-tabbing to look up at a guide/translation with every drop just isn't fun...some day I'll play it when I can understand it >=).
Defiant of Shrine Maiden: I actually don't have this game, but I've seen some videos and it looks steller. The intro music is amazing, and the battle screen looks pretty deep. I mean it's clearly like Touhou labyrinth where you actually require strategy to win fights. And all those stats and guages on the characters really interest me. I know that there are people trying to translate it though. I figure it wont be done anytime soon I'm not involved in the translation so I really have no clue, but something tells me to expect years instead of weeks/months. But I'm patient >=), I really do want to try this badboy sometime though.