I have a setup I'm currently pretty happy with in X3, after a long time of struggling. (Still not using the horrible Take Views, but one step at a time...) I have a keystroke for Track View and another for Piano Roll View. These are the two only views I use 95% of the time. (I will very occasionally use Tempo View and do use Console view but only at mixdown time at the end.) Currently my piece has three Midi tracks. I always have to make sure I have the correct tracks selected in Track View before I switch to PRV, so that I see the tracks I want in PRV, (which let's say for this example, is all of them). and then when I have switched to PRV, every note is in selected, so changing a release time on a note changes all of them (Arghh... Undo, unselect, then click on the only note I actually wanted to edit). What I would like to do is make a "sticky" PRV view that always shows me the same tracks no matter what I happen to have selected in Track View. This piece has piano and bass and a dummy vocal line. When in PRV I always want to see all three lines together. The idea of "selecting" tracks in Track View doesn't have relevance except on the rare occasions I am building the project by adding and ordering tracks. Then once I'm in composing mode (90% of the time that I'm working on a given project), I only seldom have to mess with the tracks themselves. I'm no longer needing to select things at the track level. 
 
Is there a way to "lock" the PRV to always show the same track and ignore what currently has focus in Track View?

Wow, really? No replies, I'm pretty surprised, I figured this was going to be one of those questions where I'd get 2-3 obvious responses right away and would end up feeling stupid that I didn't already know the answer :-)

I would use Screensets to manage your setup. One way is to save your project as a template and them use it for new projects. You can also load it to copy its screenset to a old project. 

I believe most people end up making a lot of work for themselves in the X series by closing views. Once the PRV is setup the way you want it, don't close it. If it is docked use D and SHIFT+D to show/hide the PRV (or any view in the dock). You can also right-click on the PRV tab in the dock to lock the contents. Any time a new MIDI clip is opened in the PRV, a new instance will be created because the first one is locked.

Thank you! "Lock contents" was what I was looking for. It is not clear that choosing to Open PRV effectively closes whatever PRV window was already open. So I was thinking "But I'm NOT closing the window, I'm choosing Open". I can now simply hit D to toggle back and forth, and I have what I want. Thanks again!