[asid61]

".1inch headers (PWM) - used for all signals to the roboRIO & motor controllers - minimal retention but cheap"
I like the Hansen Hobbies latching connectors way more; the peace of mind and ease of use is great. Not too expensive either. That being said PWMs work fine for me too.

"Anderson Powerpole - main battery connector & commonly wire to wire connections - medium price, good quick release, hard to crimp without special tool"
I love how you can stack them into bunches, but they are very hard to put together and remove this way, especially if a single component in a bundle fails.

"RJ45 (ethernet) - Used on the radio & roboRIO"
I've thought about using these for non-ethernet applications due to the availability of crimpers, crimps, and cheap cable cost of many different lengths from digikey. I have used a few of these in non-FRC non-ethernet applications, and they've performed admirably.