It took me a surprisingly long time to complete my signature, as simple as it may currently look. This was because of some complications I had while trying to do my text gradient. I made the hard decision to leave my computer on and running (but on 'sleep' mode) throughout the night as I didn't have enough time to finish my signature. Then what do you know- the power goes out during the night and I lost my work and had to start over. I can't imagine how much more frustrating that would be if I had more BBCode knowledge and put more work into my sig for it to get lost overnight.
So the suggestion!
What if we had drafts for signatures- similar to forum posts? If I could have saved my in-progress sig before I went to sleep, I wouldn't have had to make it all over again and go through the gradient stuff again. We could come back and work on our signatures without having to leave our devices running, and we wouldn't need to worry about it getting deleted for some reason!