My all time favorite games are Warcraft II and Heroes of M and M II..I also have WC III and it is a great game as well. Heroes is turn based strategy, a little different but fun.
There is something about WC II though that made it special! Not sure if you have the battleships and fighting ships in part 3, so that is one thing missing.
I also loved Caesar III - more of a strategy game though.
Civilization(s) 1 through 3 were great.
I could get lost in Heroes of MM II for days. The Might and Magic series was great too. Too bad it seemd 3DO has gone out of business.