Really nice. I like it... No offense, but much better then previous one with Me 309.
I've noticed that you are leaning towards the black background with most of your siggys. Personal preference I guess, but I would rather go with lighter tones...
No, you don't need to make a new one if you like this one. Point was there's no need to change it as often as you do. When you adopt one siggy which you really like and keep it for a long time, then other members can identify you with it and when they see it they know its you and not some other member with similar user name.