Prefer Sterlings myself, nice roomy cab, rides nice, good turning radius, I find they're the easiest to blindside with. The newer Internationals seem to have the most power for hills, but they seem to be designed for someone about 5' 6", great speaker system though, they tend to ride rough when bobtailing, seems to be an International trait.
The Mack visions are pretty good all around, the cab could be a little roomier though. They are very quiet, almost like riding in your car. They tend to pop out of gear a lot though, ant the fith wheel release is a nightmare, instead of just pulling the handle you have to move the handle forward then pull it.
The older long nose Mack are good also, only depending on what year, the turning radius's are all over the place, ex: the "261" series turn quite well, but a "265" will have you pulling up 3 times. Trucks can be specced out pretty much down to the last nut and bolt, of course when someone who thinks a "fifth wheel" is the steering wheel specs them out based strictly on price this is what happens.
This is a company that reduced left turns for package car routes because it saved something like 7 seconds per turn, but probably for a modest (if any) increase in cost, could spec out a steering system on a tractor that would save how much time when spotting a trailer, but doesn't.
They all have there good and bad points, kinda wish could have a combination of them.