Well, this question is really tricky, for me, because I watch it almost every way.
Well let's see:
I download anime off the computer:
English, and Japanese.
Quality counts
My computer hardly has gigs left.
I watch anime on TV and On Demand. Thank you Comcast and Anime Selects, Anime Network, G4, and Adult Swim, and Cartoon Network, and Starz
Anyways, I also have bought the Full Metal Panic "Sexy" Thinpak, as advertised in the Anime Network informercial.
And......I've rented anime, ummmm..yeah, basically, I've done three out of 4.
IMO, 4th one is actually watching anime in a convention, which I haven't done, because I haven't been to any anime convention.