My shop has evolved over the years as my hobbies do too. I used to do quite a bit of turning when I was in HS on my dad's lathe using firewood from the burn pile, nothing as artistic as what some of you guys do. At my last house I didn't have the room for a large shop. I used part of my basement for stained glass and doing finish work on my projects in the winter time. The tools in the garage evolved to more mobile and combined use setups to accommodate more tools. I sold my lathe, extra planer, dust collector at the time to make room and afford a welder, then got into doing more welding/metal projects
Thinking about it, I typically focus on one hobby at a time most of the time and learn it. The stained glass has sat for a few years, but I have done some recently (mostly repairs) and am setup to do it again. The welding I use from time to time and have a couple of projects on my list, but don't do much of it exclusively. Woodworking is setup all the time, but I do mostly flat work and for mostly functional use. So I guess I have focused on one area for WW as it fits my needs. I do have other tools on the wish list, but they are still for cabinet making and such. I don't see the need to limit yourself, just buy tools as you need them for projects and work on what you enjoy. Focus on learning the task until you feel you've done so.
To a small child, the perfect granddad is unafraid of big dogs and fierce storms but absolutely terrified of the word “boo.” – Robert Brault