wow-- thats a lot of sigs--- gona ba hard to comment on all of em' -- maybe you could put em in seperate posts- imo and you get more credits as an added bonus !
Work on text and depth. Your effects are pretty plain for the most part on these. First one isn't that bad. Pretty nice on that one. Keep workin. ^_^
Try to look at tutorials. It should help. Just get some depth and effects in the BG and you should be good.