I'll use the Plain Green still i think.
Its ok..... at the bottom the "vBulletin.org" doesnt fit in. Neither does the light text on the light background. Im not 'digging' the clouds either, they just seem a bit "for the sake of it". Also dont understand why theres a full carrige return at the end of the footer though not needing. The rollovers im unsure off too. The line is a bit "for the sake of it" too... Also dont like the way that it goes from blue to white.
Else is alright though

like the buttons.