I LOVE ROKU!!!! It's my favorite techie device I own... I use is daily.
We only use it for Netflix, HuluPlus, and pandora. We also have a subscription to Playon - which allows us to get streaming directly off network channels like CBS that aren't a part of Hulu - and to get the hulu shows that aren't included in HuluPlus. I really don't venture from those channels. Hubby will sometimes watch NASA and CNBC... and kiddo likes playing angry birds on the "big screen." We do have Amazon because hubby has prime - but since most of the shows I watch are on netflix, too, I find using netflix easier.