Or, lacking motivation for a serious project, fool around with "not-so-serious" stuff: box/toy cameras, pinhole, Polaroid/Instax, flatbed scanner as still life camera, one of those build-your-own large format kits... 🙂
Modern digital cameras are boring by their very nature – with each technological and ergonomical improvement, they grow more predictable, dependable. There's little room for surprise. You push the button and you know pretty much exactly what you're going to get. This is excellent news for production/professional work, but not so great for play. Jumping from one camera to another similar one will buy you a couple of months worth of gear-related excitement and then you'll gradually settle into boredom and/or GAS pains again. Seriously – my recommendation is not to look for some new approximation of perfection in expensive gear but to allow some elements of chance, play, surprise in your process.