The CDT is mentally exhausting - if you daydream for a few miles you’ll look around and suddenly realise that you have no idea where you are. Sit down and pull out the GPS and maps. Sometimes even if you ARE paying attention you’ll have no idea where you are. Sit down and pull out the GPS and maps. In some places you’ll be glad to have five people with you, because you can’t find the blazes, and you all spread out and look, then someone calls out when you find the next blaze and you all congregate, and repeat for a few miles. You’ll see a section of trail that looks good on the map and try it out, and spend the next few hours bushwhacking or sliding down a 30 degree scree slope or glissading down the craziest scary snow cornice you’ve ever seen.
The CDT is awesome, and scary, and incredible, and exhausting.
The PCT is like CDT-lite. It has almost all of these things, without the danger of getting lost (of course you’ll need maps and a compass and the trail guides, but it’s not even close to the amount of attention you need to pay). It has a gasp trail! The whole way! But some people will start to sneer and turn up their noses at you if you try to deviate from that trail to do something cool instead. I think I hit every ecosystem except arctic and tropical rain forest on the PCT.
The PCT is my favourite of the big three trails. I’d definitely hike it again. I have a love-hate relationship with the CDT, and the PCT is really just a love-love relationship with a few rocky patches of annoyance. 
Haiku