This isn't really in order of best to worst since I don't have a number 1 favorite anime of all time. These are just 10 of my favorite anime.
1. Tengen Toppa Gurren Lagann 2. My Teenage Romantic Comedy is Wrong as I Expected 3. Baka to Test to Shoukanjuu 4. Chuunibyou demo Koi ga Shitai! 5. Toradora 6. Golden Time 7. Tonari no Kaibutsu-kun 8. Danganronpa the Animation 9. Umineko no Naku Koro Ni/Higurashi no Naku Koro Ni 10. Hyouka