Oh man, the character writing is an added bonus. I also have a child-style of handwriting--curiously, for a character in an old comic of mine. Must post on that when it is not 1 am....
At first glance, your self-note writing is very similar to a friend of mine's, who is also interested in making writing systems and so forth. Cuuurious.
Snape-writing is totally teacher writing. Awesome.
I can tell my roommates are irritated with me being up so late, so I must curtail my commenting for the moment, alas.