Sizarix

The first two seasons are absolutely perfect (very well written), with the second season being my favorite. Season 3 was still amazing, though some story lines felt rushed due to the shorter episode count. Seasons 4 and 5 are the opposite-- many of the story arcs felt stretched out. Overall, it's a very good show, and even at its worst, it's still watchable and enjoyable.

I know the second half of the series was a bit of a downgrade in quality (season 4 in particular being really bad), but the first three seasons are so amazing that I just can't give the whole series anything less than a ten. Plus, the later seasons aren't all bad-- season 5 is one of my personal favorites. I can't wait for the movie, it gives me a reason to live.