Nothing beats Session mode if you'r main goal is playing/improvising music. I work with Live exclusively after having tested FL and Reason. I also have Bitwig sitting on my computer waiting to be used,but time issues held me back yet.
For my personal taste most 'standard' DAWs like Logic/Cubase are too cluttered with all sorts of technical stuff, I produce for five years now in Live and never felt anything really missing, though there are better midi editors/arrangement functions out there.