I was always afraid to try rhythm games, because I generally was uncoordinated and bad at games. I had tried out some other game in a mall once and couldn't figure out how to use the guitar (the guy at the booth wasn't very helpful either).
Anyway, I broke down and got RB1 for the Wii... and promptly lost my job. Still, I had fun, and scraped togeather enough to eventually get RB2 and started throwing RB parties.
About 6 months in (mid-2009), I migrated to the PS3 haven't looked back. I've been holding monthly RB parties that range from 3-20 folks in attendance (some coming from over 120 miles away), I'll have 933 songs as soon as I get home (got to snag Loggins), and I play well enough on Expert to occasionally tickle the top of the leaderboards. I've also managed to sell a few friends on RB, and strengthened some good friendships.
RB has also given me some great family moments. My wife, who usually hates video games, enjoys RB enough to stick around and listen/watch, and has even played on occasion (She's actually a pretty good vocalist), and the little one enjoys some of the cute songs I've snagged (Spongebob, Parry Gripp, "Before He Cheats"...) and loves dancing or singing along to several of them.
RB has helped me stay positive though some tough times, and got me back into video games in a major way though getting the PS3. It's deepened and broadened my appreciation of music (I listen to more music now than I ever did prior to RB), and it's been a bright spot in my life for almost 4 years now.
If I could afford to and had the time, I'd probably pick up a mustang and try to learn real guitar.