I use (gasp!!!) a Zune. I LOVE the Zune Pass... I am all about the idea of renting things. I only own a couple of movies as I only watch a movie once (rarely twice) in my lifetime and therefore renting works for me. I am the same way with music... I get into certain bands for awhile and then never want to hear them again. Also, when I get a horribly trendy and catchy song stuck in my head (Katy Perry's "I Kissed A Girl") I can download it, overplay it until I want to vomit, and then delete it without being charged .99 for a song I don't want to keep for life. When I really love a band/album/etc. I will pay for a CD (I like getting the artwork, etc.) and then rip it onto my Zune.
Also, I love the idea of the Zune Pass because I can be daring and try out a new band I have never heard of without it costing me a dime (just the monthly rental fee for unlimited downloads.)
For me it is about saving money WITH the ability to be adventurous.