Spoiler Alert, click show to read: 
You realize, of course, that pretty much every response you receive here is going to be biased.


I've always preferred MTW for its superior atmosphere, gameplay, and excellent AI. So long as you don't have a problem with older graphics, I'd say you should come on back.


It really depends on what you like (and what you don't like), though. Perhaps the most pertinent question to be asked is, why are you considering going back to MTW in the first place?