Full time is every single minute of your life lived in your intended gender. When you start to formalize the thing, there will always be some point which will cause problems with some people. In my case, it's the name change. I'm not a US citizen, but I've lived in California for the last 5 years and have no intention of leaving. Furthermore, due to some legal procedure pending (divorce), I'm postponing the actual name change by at least 6 months. And after that, it's gonna be one big adventure to visit the different agencies in the right order, on both side of the borders. But except for the name, and of course the plumbing, I'm living 100% as female. And so glad of it.
Cheers,