Pro Tools Studio Perpetual : Industry standard

I've been using Protools since the early nineties, alongside Logic and some other DAWs along the way. PT is an industry standard and so the main reason I use it nowadays is so I can exchange files easily when working in a team. It is more precise and robust in the way it deals with detail and sync compared to Logic which is more for creativity and can be a bit fluffy around the edges on a technical level. My main gripe with Protools is its inflexibility - you can't reassign the keyboard shortcuts for example and the way you have to lay the screen out is sometimes not ideal. But apart from that it is a fully mature program that you can do whatever you want to with and it works very well.