It's like asking., "what's the best car on the road?". Or, What's the best detergent? The best petrol, the best carpentry tools etc..etc.... At the end of the day, and as always, you get what you pay for 98% of the time. Who has the time and money to use every DAW out there to it's fullest capacity just to decide which one to use all the time? Each have their own learn curve and most have everything necessary to do the job. If you're just starting out recording audio and MIDI and want high-end sounds included in the package, plenty of support, continual upgrades and updates to the system, any one of three from the top sellers will work.
Unless of course, you just like switching DAW platforms because you can't actually sit and do the thinking work involved in making one work for you. Sometimes you just have to make a choice and stick with it. What if, in an international survey Steinberg/Yamaha's Cubase moved into the "INDUSTRY STANDARD" position taking away Avid's ProTools from the lead? Don't you think people would be jumping the PT ship and going with Cubase? I bet they would. And mostly for pretentious reasons.
No wait.... I'll have what she's having... No wait! I'll take an Acid for tracking, a Cubase for MIDI editing, a ProTools for audio recording, a Logic for symphonic and orchestral tracking, Reaper for mastering etc..etc...etc......
How can a guy get any work done around here?