It really depends on the environment. It's one thing to work in a one man creative operation and another to work in a team environment. I've never worked on a team in regards to music but I completely relate to it from (and this may seem ridiculous) my experience as a kid working at a McDonalds burger joint. There was a systematic approach to the most simple of operations. One guy did the buns, another cooked the meat and another dressed the buns when they were ready. It was mustard first, ketchup second, pickle third and finally the meat, followed by the remaining half of the bun. It seemed stupid at first, having to put the dressings in a particular order but when a franchise five miles across town was short staffed, two of us were sent to that location and we integrated into their crew like we were permanent employees.
In PT, you pretty much can't change anything about it except the track colors and maybe their version of track templates (which involves knowing a trick or two to set up). The I/O is kind of regimented but you can go to a window and clearly see what is what. It's more like setting up a patch bay and once you set it up, it's done and you can use it on other projects. But, this regimentation must also make it much easier to pass one project around to different staff or other studios.
That's not to say that you can't do the same thing in SONAR however, I've gotten some projects that were so totally "different" that I it took me a little while to figure out what was going on.
Me, after fighting with it and trying to make PT into SONAR and realizing that it wasn't going to be SONAR no matter how I looked for ways to accomplish that, I started to appreciate some of the rigidity that encouraged me to make a plan and consider what I was trying to end up with before I started a project. That's not to say that it is impossible to go into a PT project totally willy nilly because I can do that too. Haha.
It been said here before and I'll say it again. Use the tool you need for the job you have to do and enjoy them and use them for what they are and what they can do.