I wouldn't spend time thinking about your minimum requirements. Seems like you've already something pretty close to that.
I recommend instead to think about what your ideal situation is, and then invest your energy in creating/achieving that. Make it something compelling enough that you'll put in the massive amount of effort to make it happen.
Hearing other peoples ideal work situations might be a source of ideas, but ultimately, it's up to you to decide what's important to you.
Personally, my list includes: high income, respectful clients, choice of languages and technologies, working on things that matter, getting paid to learn new technologies, smart colleagues, good process, autonomy, time freedom, location freedom, ability to bring in team members I select, low bureaucracy, low politics, and working with contacts high on the org chart.
As far as my physical work environment, I'm pretty flexible. I've worked from coworking spaces, cafes, Regus locations, hotels, 3/5/7-series BMWs, airplanes, restaurants, E/S-class Mercedes', dinner tables, beaches, boats, train stations, and occasionally even the offices of my clients. I do my best to pay attention to ergonomics and environmental quality. I carry an inflatable lumbar pillow and a yoga mat and like workspaces free of fluorescent lighting and chemical scents.