anime opening themes

Inspired by a recent post on the anime blog Simplicity, I spent hours and hours today looking up some of my favorite anime opening themes and writing comments. I found it difficult to do a top ten, so I decided to categorize them instead.

Also, this is a good way to show off my extensive vocabulary. Frequent winners are "nice", "neat", "great", and "appropriate".

( Opening Themes )

So... what are your favorite anime opening themes?