Quest for Glory has been my favorite series throughout all the games i have played so far. They had everything. Adventuring, RPG elements, smart puzzles, a storyline and especially the importing of your hero to the next part of the series really made you go and play the previous game with ALL the hero types and maximizing the stats, just so you had an slightly advantage with the new game.
I distinctly remember the time i had made in QfG I EGA a super thief (with fighter and magic elements) and then my frustration as the QfG 2 recognized him as a mage!
However i have to say that QfG 3 was my all time favorite. First QfG without a parser. Fantastic graphics (for the time), exceptional storyline, nice riddles. I really enjoyed it.
Row of preference: 3 - 2 - 1 - 4 - 5.
4 was buggy at best and 5 was not too QfG equivalent!
I think i still have somewhere the CD that was published with all the QfG without 5.
Love QfG!