What I didn't like of D&D 4E when i got it (I must admit I didn't read in depth all the rules) was the massive stereotyping of classes: paladins and fighter got a taunt, casters are crowd controllers, healers or damage dealers, etc...

Yes, you can play older D&D editions (or most rpgs around) just as tactical/number "games", yet before 4e you could customize and "un-stereotype" your class. It needs more work for players (and DMs), yet you could play a social fighter, a tanking bard, or whoever you want and you get the skills/equipment/styles to do this.
In 4e as far as I remember reading the manuals you can't or at least you aren't encouraged.

That's why I still preffer to play with 3e/pf more than 4e.