Would you happen to be Ren from Club Bleach?
I sort of wondered.
anyway, for someone who started in May 2011, you sure either have a fuck ton of really great gurus/tuts or wow, you are talented.
I used to do GFX, got bored because lol-not-real-art comments from a lot of people (aka DevArt) but let's not dwell on that, my favorite now is currently your:
Reimu flower, very nice, pleasant to look at, nice notebook effect.
Trendwhore Mokou is fantastic, this is quite pro, at the height of my creations I used to do stuff like this but only with real stocks, a bit flat overall, not the best I seen.
Sakuya and Alice brush cloud thing is quite good as well, depth seems to focus on one side, not too fond of that but flow is near well perfect. Lighting needs work on both.
your new updates are kinda meh, all are kinda flat, but Byakuren has an added touch of flair because the background is really nice, I would suggest not using that layering effect over her, but sparingly apply on the background to gain a 'float' effect for some of the back image.
Marisa has poor stock, and winter Remi is... just no.
nonetheless, great overall work 7/10 if you do the rating thing like most GFX hobsnob sites do.