Vikings are probably my favorite unit to recruit, they are just too flexible and dependable to switch them with swords until late game. I don't bother with landsmenn or huscarles anymore, even though I love them in battle they are too much of a pain logistically. In early as a catholic, if I have a choice the only swords I go for are the specials, Swabians, Gallowglasses (great flankers), and Clansmen (love the speed).

Halberdiers I just don't have the patience for. Too slow, and questionable morale. The best thing they do is soak up arrows, so they have some use when the Horde comes to town. Swiss Halberdiers, on the other hand, are excellent, especially with some armour upgrades. And Billmen are worth it as well.

But when the grind of the later game comes around, CMAA are just too solid to pass up, and eventually phase out the axes as my main attacking unit.