Yeah, I'm experimenting around with having multiple images in a single signature. Probably one for characters, another for general events, I'll try to make one with all Himawari appearances and so forth, like funny events, sad events... (all of this as I have time, but I think I got the basic hang of it) - adding effects seems to make it too heavy, but if I keep it simple I can add many pictures.
Edit: Also trying to avoid major spoilers for obvious reasons (other than Himawari, but that's a theory, even though I'm sure of it).