15" 2010 MBP > 15" 2011 MBP > 15" 2011 MBP refresh > 13" 2012 MBA > (in one week!) 15" Late 2013 rMBP
I only had the second MBP for a week, until Apple released a refreshed model, and I just exchanged it for the newest model, because of the return period. But technically I've owned it.
I'm such a sucker for upgrades.