which brake controller is most preffered

I have had them all. The timed based controllers work. That is absolutely true. I have had proportional controllers as well. They work too.

My Voyager was a good controller but so was my Hayes Syncronizer. The only issue that I have with proportional controllers is the potential for them not to work in slick or lose conditions. What if the you hit the brakes on the tv and the front tires skid or abs kicks in? The proportional controller may not send much if any power to the trailer. Timed controllers will apply trailer brakes every time you hit the pedal.

Proportional are smoother
Timed tend to let you feel the tug of the trailer more. (Some may actually find this comforting)

Both are safe and meet the legal requirements for having trailer brakes.

Study how to adjust your controller. If your not satisfied with it then look into other options.

I have a friend who is always fiddling with his Prodigy and is not satisfied. Another with a Hayes Synchronizer who is completely satisfied.

Thanks

Jeremiah