I would much prefer the original. Mainly because I have never played number 2

The original kept me occupied for hours... and still can. If it ain't broke... don't modernise it you Ubisoft marketing whores!!!
Settlers 5 annoyed enough people... wasted my time downloading the demo... and all they have to show for number 6 is more graphics. I am crossing my fingers that they have learnt their lesson with gameplay.
[jumps on soap box]
Settlers is unfortunately one of those sparks of genius that cannot be recreated by a commitee of "Game Designers" that are under a belief that you can make a good game from following design 'rules' or 'guidelines'. You can blame the current lack of innovation in the games industry on the prevalence of this mindset in larger production and publishing houses. Why can't they take some damn risks and do something *different*?
[jumps off]
Anyway, the old-school version won't be another Age Of Empires clone, thank god.... I hope.... can it?