Let me make it short & sweet. It would be purely for the title. I just received my 3rd masters (mechanical engineering, engineering management, & mba). I have done all 3 masters in a 3 year period while working full-time running a company. I just had a baby (6 months old as of now). I can pursue a PhD in either of these fields, but am considering either mechanical engineering or engineering management. I've done my own work pertaining to the field I work in (commercial & industrial HVAC; process cooling for refineries & data center cooling primarily) for my masters. I don't need it, but I WANT it. It can also help me snag an adjunct professor position at some point later down the road if I feel like teaching on the side. I forgot to mention that I am 26 years old. I have not taken a break from school EVER! Should I start at it in the fall, take a break, or just not pursue it? Anybody that has experience with doing a dissertation, please let me know how it compares to a thesis. That's my biggest concern. Classes are a fixed duration & not the worry, the dissertation is the variable when it comes to how long it would take to complete. Opinions?