Mogudan started off so great. I was a fan of his after reading the Chou Soreyuki Mefina-San doujin, but I didn't even know who he was then. After that, I found his Ayanami series... and then they got outta hand.
Yuji... what can I say? His artwork is controlled, but so free. It doesn't get too far out there. It never deviates far from where the character is supposed to go. And you can always tell who it is(assuming you know who the character is in the first place, you won't get confused). He's my current favorite artist.