QUOTE(gronk @ May 26 2009, 10:16 PM)

I'll hang on then for 2nd edition and in the mean time pick up some Romans and Vikings!
The Romans are a smaller army especially if you pack out your force with veterans. If you play against barbarians expect to be seriously outnumbered. They do have a good range of choices.
Vikings are good. They are all infantry with no cavalry options.
Whilst the stat lines are very similar because they are all humans this doesn't really come accross as a limitation when you play. I have found that it actually enhances the importance of other areas such as how the troops are armed, unit sizes and how you use them together.
For example, the basic troop types for viking are hirdmen, bondir and thralls. Hirdmen are the tough armoured guys, bondir the standard unarmoured troop, and thralls are weak, armed slaves. But within these troops you have choices that will significantly affect play. For example, your hirdmen could have hand weapons and shield (the base), throwing spears (essentially an extra attack when you charge), thrusting spears (2 ranks when don't move), 2 hand weapons (extra attack) or 2h weapons (+2 str, strike last). Or you can have Different Weapons which lets you have two weapon types in your unit, eg half with 2h weapons and half with spears. This allows for incredible variety and tactical options.
This basic troop type therefore covers most WHFB troops. For example, with my dark elves to use 2h weapons I choose Executioners, for 2 weapons I choose Corsairs or WE, for spears or hand weapons I choose spearmen. So with WHFB the troop choices you make determine how you play your army, in WAB how you arm your troops will determine how they play.
There are other elements as well. Some viking forces are Light Infantry. This lets them use either a formed formation or skirmishing. When moving they skirmish, negating most terrain penalties, and when they form they can only count +2 rank bonuses max, not +3. You trade mobility for combat resolution.
Strength enhancing weapons also become extremely potent as there are no ward saves or high toughness. If a 2h weapon hits it pretty much kills. Crossbows are lethal (in DnD they'd be vorpal) at str4 -1 armour.
What I have found is that you really need to play around your style in WAB as you don't tend to have a killer combo or unit or hero that can pull your bacon out of the fire. You need to support units, screen forces, target the flanks, hold key position and terrain and be extremely thoughtful in you manouvering. An isolated unit is a dead unit.
I play WHFB because I get social gaming with my mates. Some of it frustrates me. I enjoy the actual gaming side of WAB more because of what Senexis said - it avoids most of the breakage of WHFB.
If you play against Aaron's Normans take Ulfhednar with 2h axes and beserkers. Watch him quiver in fear, those things eat cavalry.