Number of turns important?
So I know the importance of turns when building or training units, and moving around the map, but in the grand scheme of things or the big picture, does the number of turns matter? What I mean is, is it a point of the game to win a game in a lower number of turns, or does the number of turns that a game lasts not really matter?
I don't have too much experience with turn based games with the exception of turn based RPGs on the DS. I have briefly played HoMM5 and a bit of Civ, so I understand the mechanics of TBS games, but even in them I often wonder if I should be hurrying to do certain stuff because of the number of turns that has passed by. Or can I just casually and relaxingly play the game, and not worry about the eventual number of turns that has passed, or how many a game might last through?