Born CO, but schooled in Eugene. Go Ducks.
PNW: Gray and rainy, year round boating, ocean nearby, skiing nearby but with not very good conditions. Cool people. Big rivers, and some really big waterfalls. Floated a stretch of the deschutes once, now that was a shit show, I hope they fixed that. That rogue stretch is pretty cool tho. Steve Largent and Brian Bosworth.
CO: Blue skies abound. Seasonal boating, best snow on earth (with a nod to utah of course), really fresh fish thanks to fedex and ups, only one big river flowing west (but nothing close to the PNW biggies), but headwaters to four major drainages, one of which has multiple branches. Floated a stretch of upper colorado on a holiday weekend, and that was a shit show too (continues to be too). Elway and Gradishar.
MJ legal in both states (OR will soon follow), and we played in the super bowl. And sorry seahawks fans, my beloved Broncos have lost more super bowls than your team will ever play in (I think that's a good thing...). I loved having them in the old AFC west, they were usually good for a victory.
Final synopsis: CO wins based on quality of snow and abundant blue skies! And of course the NFL team.
But you can't go wrong living in either place!