Ok, I'll add a few more things. First, I do not want this to become a 'which is a better DAW thread', because 'better' is relative to how you work and the kind of work you do (ie: composing with a midi controller, composing with a score, composing with loops, composing with your own recorded audio 'sketches', full blown multi-track recording and editing, stereo mixing, surround mixing, sound design, 2-track audio sweetening, mastering etc etc.).
I am doing mostly multi-track recording from the analog domain and sometimes I use supporting midi tracks (virtual instruments and samplers) to augment the sound recordings. I don't midi program from scratch, but I do use the essential midi editing features to tighten up a midi performance in relation to the analog recordings. In that regard, PT gives me more than I could ask for.
I find the PT Mixer window to be very intuitive. Off the top of my head, here is what I like about it: The signal flow reminds me of an analog console. The track grouping and hide functions are easily accessible on the left, and the hotkeys for them are a no brainer to learn. There is a place to make track comments about performances, recording chains, potential problems, processing rendered to audio, nudge amounts, etc. You can drag and drop plugin and send inserts in a similar manner to OSX's drag and drop (option drag copies). Assigning colors to tracks for easy identification is one click away. The routing options via the sends, track inputs and track outputs are incredibly flexible - all physical I/O and virtual busses are available everywhere. The automation controls are simple to use and are reliable.
The Edit window, where the tracks are displayed, shares many of the same features as the Mixing window. This means less flipping back and forth. The beautiful thing about editing waveform or midi regions in PT, is that with the Triple Tool you can just dive right into the region without needing to dig through menus or access tool changes. Also, there is a focus keyboard mode which enables your left hand to instantly apply various manipulations to the cursor, the selection boundaries, and zoom views with a single key. This is very powerful when making intricate selections and / or fine tuning a region edit.