PSP won my heart this generation.
I though the PSP was pointless in 2004, and I finally bought one on a whim in 2007 when I was leaving on a long trip.
I got about 6 games or so for it, and only played it a few weeks, then it went back on my shelf and collected dust.
It wasn't until 2010, that I was putting together some gameplay videos and decided to go back and reseach games from dozens of systems (1985 to present).
When I looked at the PSP game list I was like, wtf, when did it get a mountain of great games?!
I went on Amazon.com and was amazed to see most PSP games selling for less than $10 each.
So, I bought dozens and dozens of PSP games over night and had a full backlog, which has grown many times over and I am still buried in.
Afterwards, I found out about PSP's amazing sleep mode (still the best thing ever) and T.V. out and was even more enthralled; this little handheld I though of as a vacation novelty was actually the game system I could have only dreamed of.
I eventually bought a 2200 mAh battery since I played so much.
And, I have probably around 110 PSP games on my shelf right now. Probably my favorite console ever, especially since it can play PSOne Classics. :D
