Obryn
Hero
Previously, fighters were basically the "whatever" class. Due to their feats, they could be molded into basically any combat style by the time they hit higher levels.
Their wealth of feats let them specialize in a single weapon of whatever kind, or else be a huge generalist.
4e tightens down class roles significantly, compared to 3e. The fighter, wizard, and cleric had been the most flexible classes in 3e, but are now in line with everyone else. So, if someone feels that the classes are constraining - they'll focus on one of these three guys.
-O
Their wealth of feats let them specialize in a single weapon of whatever kind, or else be a huge generalist.
4e tightens down class roles significantly, compared to 3e. The fighter, wizard, and cleric had been the most flexible classes in 3e, but are now in line with everyone else. So, if someone feels that the classes are constraining - they'll focus on one of these three guys.
-O