Thanks again for all the comments, everyone. I'll see what I can do to answer a few of the questions/comments.
-Kathy: I think I've said it before, but I'll say it again. Section hiking affords some major benefits over through-hiking, so I hope it works out great for you. Also, I've met a heck of a lot of 60+ through- and section-hikers on various trails, and they always seem to be having the best time out of anyone I've met!
-Eric Chan: Yeah, definitely the humidity. Probably at least a little bit due to running out of fat reserves and natural insulation along the way, too. By the end I was not too happy about the idea of eating more hiker food. I just wanted a slab of meat and fresh vegetables.
-John: Passport... well, I know you need it to get back in to the US if you plan on going through Vancouver (which I did). If you plan on going to Manning Park lodge and then hiking back into the US, it would also probably be a good idea. But there's no border guard at the PCT crossing. I probably shouldn't say any more.
-Patrick: Amen to the kindness of others. I heard you'll be on the CDT in 2013... I don't know if I'll be able to make it, but it would be really great to hike with you again!
-Eric Ross: I keep my identity hidden :) It was nice to meet you!
-Warren: I ordered five bottles of Aqua Mira drops at the beginning of the PCT and kept the spares in my bounce box. I also had a pile of the solid tabs left over from the New England Trail the previous year. I kept a few in my first aid kit as back up, and then when the liquid drops ran out I switched entirely to the solid ones.
-Dug: My usual advice for future through hikers is "don't listen to anything that anybody says!" But I guess that's a little extreme, so I've toned it down to this. Glad you liked it.
As for my footwear: I started with my trusty NewBalance 811's (Campo to Idyllwild), then switched to Montrail Mountain Masochists (Idyllwild to Mammoth), then back to NewBalance 909's (Mammoth to Old Station) once I figured my feet were okay since I hadn't had any blisters in a while. Then back to the Montrails (Old Station to Cascade Locks), and then I decided to switch things up a bit at the end and tried Vasque Blurs (Cascade Locks to Canada). My feet just don't seem to agree with the PCT-- they were getting blistered up practically everywhere except the Sierras. I think having constantly wet feet in that section actually helped keep my feet healthy (weird, since the opposite is usually true back home). I'm not a certain what made the NB's work less well out west than in the east, but here are the differences I saw: I went with a snugger fit and stiffer soles in the Masochists and Blurs, which seemed to help. The trail tread on the PCT was generally dry, gravelly, dusty, and/or sandy, versus softer/springier dirt (or mud) and solid slab rock on the AT. Different shoes for different trails, I guess.
Whew. That's a lot. Cheers, everyone!