As a teenager I used to love nothing better than visiting independent record shops or going to record fairs and buying vinyl albums/singles.
However I download everything now (unless it's a band I'm a massive fan of, in which case I might also get the CD or vinyl versions) - and in truth I couldn't really care less about what it means to the music world. Bands make their money from touring these days, and record companies have ripped fans and artists off for years.
All I know is it's cheaper to download, you get your music in seconds, and you can store it on your laptop and MP3/Ipod, so it saves room in your house!
Hate itunes though, it's a horrible site and I avoid it at all costs. I use Amazon and have also used Play.com and will continue to do so.