Maybe the sig limit should be a bit less strict? My signature is the absolute maximum amount of characters that are allowed in a sig. I have 500 characters in it, and the max is 500.

I think a reasonable amount is 600 or 650. If someones signature gets too big, then a moderator or admin could simply warn the user.

I agree. Yes, a bigger signature would be nice. The only complaint I'd make at sigs is if a member's sig is more than 10 lines long. (ie Their sig takes up more space than the average post...)

600-700 characters should be nice.