I'm a student and have been watching anime since I was a toddler, starting out with Pokemon. I watched the 'mainstream trio' in middle school when I started to look for something actually entertaining. I stumbled across Azumanga Daioh in 2008 and since then have been watching anime as if there's no tomorrow.
How my Ratings work:
5 Stars: The ultimate, best and most perfect show OF IT'S GENRE.
4.5 Stars: An absolutely excellent show worth watching several times over.
4 Stars: A Great show that almost everyone will love.
3.5 Stars: A Good Anime that many people will enjoy, dependant on genre.
3 Stars: A decent anime that I found enjoyable, but would probably never rewatch.
2.5 Stars: A pillar of mediocrity that I am indifferent to.
2 Stars: A crappy show with one or two saving graces. Potentially enjoyable, but unlikely.
1.5 Stars: A very crappy show that I would not recomend to anyone.
1 Star: An absolutely terrible show that doesn't deserve to exist.
0.5 Stars: The worst anime of it's genre, possibly of all time.
0 Stars: Everyone who worked on this needs to die. Seriously.
now that I've bothered with that I'll have to go around rating my watchedlist. The thing is that a lot of the stuff there I haven't seen in a few years and don't feel comfortable in my ability to give it a fair rating. You may notice that a majority of my reviews are in the 4-4.5 range. This is because of the fact that I tend to drop crappy anime before finishing them, and that I almost never rate an anime I have not finished.