I'm new here. I'm 67 and playing since the mid 1950's. I have always liked to practice to keep improving.
I studied Johnny Smith and Django Rheinhart for 17 years under a session player from NYC. I practiced other styles on my own. Today, I get up at 4:30AM before going to work and practice through headphones into a Kemper.
My practicing has grown and changed over the many years I have done it. I've gone through everything from 20th century harmony through other, more personal styles. I learned modes and as soon as I finished, my teacher told me to forget them and play music. That was long ago. I still play in a band, as well as hold down a 40 hour per week job. My practicing now is a mixture of chords, scales, intricate runs, and other things I feel that I need to keep my hands from going bad, as well as my mind.
Some players can lay off for weeks, or longer, and pick up a guitar and begin playing like they never stopped. If I lay off for more then one day, I'm dead meat. It scares me to not be able to practice every day, unless I am playing out. Whatever you decide to practice, make it something you can use live, if you play in a band, and add other things as needed to add more musical knowledge to your stored chops. The trick is to keep adding new things as you accomplish and understand what you are currently learning. It's not necessarily how fast you can amass a lot of knowledge. It's more important to be able to play music is a way that those you are playing for appreciate it.
To me playing guitar at home is like driving a car in the driveway. You can learn things at home, but it's how you communicate in a live setting that let's you know whether or not you understand and can execute your studies to an audience.
Some players just like to play for themselves, and I understand that. However, the thrill of the battle, and thinking on the fly gives me the satisifaction. Everyone is different. So long as you enjoy it, nothing else really matters.
As for playing a PRS, I have never played one other then a satin S2 in a Guitar Center. Nothing else is around my area. However, I am saving up for a PS later in the year. At my age, I don't have the time to own a lot of different models.