#Photoshop CC 2017
Been using photoshop since version 1 and there have been significant changes and improvements over the years.
But i must say unless you use photoshop and this app alone some of there improvements are not really required and will never be used but a majority of the creative people.
I am currently using 2015 with i must say plugins such as Topaz, ON1 Photo and many others that are far more useful and better at a few other things.
What is my recommendation update sure if you want to but rather invest in plugins they are mega awesome and can do the job in 1tenth of the time.
I will add that a Wacom Pad A4 is a must for any designer/photoshop/creative.