oh yay I like this thread. Things that make me happy:
My boyfriend when he laughs.
Laughing with other people to the point where your belly hurts and your face hurts but you can't stop and you just keep setting each other off.
My cats
Baby animals

I wish I could run a cattery and get to play with kittens all the time.

Little miniature things but not spiders.
Good books
Writing in my head
Writing something on paper that looks like it did in my head
Pictures of tarsiers, especially their stick insect hands

Orangutangs

Actually I wish I could own a zoo, with a little for pet animals too.
Talking to my brother when he sounds happy.
Lying outside in the grass with someone when its sunny.
Hearing the rain on your window and other people outside running past when you're tucked up in bed.
Certain colours.
Hearing your alarm go off and knowing you don't have to get up.
Watching iceskating on tv with my friend and eating pasta with cheese.
ehm...........................