I used to be a huge fan for the first 5 seasons, stopped caring when the original 5 started disintegrating. Still, the show had a huge impact on me and I will forever love those seasons.
S1 and S2 specially, they are my all time favorite seasons, probably of any show. I used to love GA so much, I miss just seeing Meredith, Cristina, Izzie, Alex and George chat in the cafeteria.
Such an excellent show. I've been watching it since January and I'm still only on season 10 but it's such a great show. I haven't been watching it much recently though...