1. I actually haven't really delved into or read much head canons to be honest, so I can't give a proper answer to that one ^^;
2. I really would like to see Peridot and Amethyst fuse! I can only imagine what it would like, very interesting! So many more as well.
3. Probably Hey Arnold! I loved that show, it would be interesting to see what a reboot would be like.
4. I would get rid of coffee, I'm newly into tea! Thanks in large part to my girlfriend! I'm loving it, so many different flavours and kinds.
5. I don't much like picking just one, but Zoop was pretty cool, haha.
Thanks for the questions!