As far as a quick striking (spam) build... 2-Hander is actually great. But you'll need to go an Agility Build, where you have more Athletics & Weapon Master (i.e. Weapon Proficiency) over Power Strike & Iron Flesh (i.e. Hit Points).
Check out these builds,
Level 30 (4 420 577 xp)
Strength: 18
Agility: 21
Hit points: 59
Skills to attributes: 8
Ironflesh: 3
Power Strike: 6
Athletics: 7
Weapon Master: 7
Two Handed: 165
or
Level 30 (4 420 577 xp)
Strength: 18
Agility: 21
Hit points: 65
Skills to attributes: 8
Ironflesh: 6
Power Strike: 6
Athletics: 7
Weapon Master: 4
Two Handed: 140
I personally use Build #2. It has more HP (Iron Flesh) but less WPF in 2-Handed (cause less Weapon Master).
But for a spammer, I'd think Build #1 would be better. It's only down side is that it's a little low on the HP side. And if you want to be quick, you should only wear light or medium armor... so you won't be able to greatly rely on your armor to survive.
What that means is... you'll have to learn to block! But in truth, to be good with any class or any style... blocking is essential. With that said, having quick feet and quick swings will certainly help (especially once you learn to block). On top of it all... having such quick swings... you'll at least get some kills while your trying to learn to block. I know it can get frustrating. I've only played for about a month. About a week ago, I was playing, and all of a sudden, the game seemed to slow down. I could actually see swings coming and block them. Now don't get me wrong, I still suck... still die a lot... and still have a long way to go. But I've seen progress... and it came all at once. As if there's steps... or phases... to the learning process.
Lastly let's talk about your 2-Handed weapon selection... a key to spamming (along with footwork). Most spammers tend to go with the Katana. It's the fastest 2-Hander. However, if you're like me, you don't want to look like an out of place Medieval knight carrying around a Samurai sword. So your other two options for speed are the Longsword or Heavy Bastard Sword (HBS). Really not much difference in these weapons. Check them out for yourself in the shop. Almost identical stats. And in truth, both are decently cheap (mid-ranged price for 2-Handers). Buy both, and see which on you like best.
There's other 2-Handed options as well. The Danish Greatsword is probably the most popular (it's what I use). So folks really like the German GS. I've heard it has animations that are harder to pick up (but I've never used it). Both of these (along with all GS's) have much great reach and damage than the LS or HBS. But at the cost of speed. So the GS's may not be for you. If you do like them... also look at the Highland Claymore and the Sword of War (other popular GS's).
Lastly you have the Flamberge. Huge GS. Slowest, but greatest reach and damage. And you can't sheath it (meaning you can't put it on your back). But that shouldn't be an issue, as you'll be a dedicated 2-Hander. Being so slow, it's probably not for you. But if somehow you could spam it... I'd think you'd be bad news!!!
Hope this helps you Chaffee!
I suggest this build:
Level 30 (4 420 577 xp)
* Strength: 18
* Agility: 21
* Hit points: 65
* Skills to attributes: 8
* Ironflesh: 6
* Power Strike: 6
* Shield: 0
* Athletics: 7
* Riding: 0
* Horse Archery: 0
* Power Draw: 0
* Power Throw: 0
* Weapon Master: 4
* One Handed: 1
* Two Handed: 1
* Polearm: 140
* Archery: 1
* Crossbow: 1
* Throwing: 1
..using an awlpike or long awlpike as your primary weapon (polearm).
weapon length: 165
weight: 2.5
difficulty: 12
speed rating: 91
weapon length: 165
thrust damage: 33 pierce
swing damage: 17 blunt
slots: 2
Can't use on horseback
weapon length: 185
weight: 2.8
difficulty: 14
speed rating: 89
weapon length: 185
thrust damage: 32 pierce
swing damage: 18 blunt
slots: 2
Can't use on horseback
Can't sheath
As others mentioned these both play very similarly to bayoneted muskets in M&M so you might already have a decent fighting style you can adapt into this weapon. You will also be fast with this build and should be able to run in, poke, and run out if played right (not always possible but against short 1 handers and stuff you should be ok).
Really though learning blocking will be mandatory. Melee skills are waaaay better in cRPG than M&M, so expect a much tougher average enemy than what you're used to. You will get involved in a lot of longer skirmishes with players, and while you might be able to duck and weave a few times you'll be destroyed if your blocking isn't up to par.
Starting your first gen as a shielder isn't a bad idea either because it helps give you the feel for melee combat positioning. I recommend 21/15 build at 30 if you do this (7 IF, 7 PS, 5 shield, 5 athletics, 5 wm), but if you have that side of things down skip it and try to learn blocking.
Good luck!