Summary: I love my Heroes of Might and Magic! What can I say. My friend introduced me to this in the late 90's and I really enjoyed the simple role playing and two dimensional aspect. I also enjoyed how it is a learnable dynamic. I can learn how the game works so I can tweak it to my enjoyment and play it as such for my entertainment. And isn't that what video games are for, entertainment? Great game and great price.
Summary: Games like Civilization and Master of Orion 2 suffer from end-game complexity--they're fun while your civilization is small, but in order to do well, you need to have a large civilization, and as a result, you're playing for the "reward" of the game getting too complex to be fun. Further, such games have turns of variable length--sometimes nothing happens for many turns, and then you discover a tech and change what you're building, and that one turn takes a long time.