you dont have to make your own backround for it to be a good sig.....
sure, making a backround usually takes more time, but not all the time...
i dont really make my own, but i blend about 2-3 pictures together to get it, use fades and filters and such, brightness and w/e....it ends up taking just about the same amount of time....
so really, if it looks just as good, i dont see any problem in it....

but as for the sig...
i really like it....
the hulk pic goes real nicely with the backround....
im glad you didnt make the backround green as well, that wouldve killed the sig...
text is jus kinda, ehhh......plain....but i do like the green stroke on it....
i wouldve gotten rid of the bar, or make it fade out as it goes along....
i dont like that star between the subtext though....
good sig, 8.5/10...

__________________