My LEGO Nexus Organization

I guess we can afford two topics about factions. =P

So, discuss things about the factions and different classes here.

What are the faction exclusive weapons like?

I think anyone that has spent time playing with all 4 factions will tell you that each faction has it's pluses and minuses but practice and experience is the only way to perfect them. I also think that when asking which FACTION you use it's very relevant to include which skill CLASS you're talking about because the weapons vary so much. I've just always thought this topic should be FACTION/CLASS. I have both classes in all 4 factions and yet have very little play time in about half of the classes. That being said here is my experience and preferences:

I have the most practice with Assembly/engineer and like it the most.
I love the fig-o-fire from my venture/daredevil
Although I built up my Sentinel rank 3 in both classes early after release I haven't used it much and didn't truly appreciate the knights blocking capability. I still haven't mastered it, but this is my currently most active fig while I learn to master it's skills.
I've used the paradox marauder a fair amount, but like it best to stay at home and hold my coins and rares.

You have a very good point there... I'll quickly update the topic to include both. =)

I have played all 4 factions and here are my preferences.

I have the most battle experience with Paradox/Space Marauder, followed closely by Assembly/Engineer. With the recent changes to ability damage I do have to say that the Sorcerer is very good in teams. They can now do decent damage and the team imagination return is great.

Space Marauder: Area effect spammer. Great for a mass of enemies, ok against bosses
Sorcerer: Riot Control & Imagination Battery
Engineer: Area Control, Lockdown, & Healer
Summoner: Area Control, Distraction, & Healer

My experience with Sentinel is a lot less but they tend to be the front line tank, regardless of class. With the recent change of only returning 1 Armor after a smash I have to see if the still have the ability to solo any area for extended periods of time (without using consumables).

I like the Venture abilities and with the damage changes I may give them a shot again but I just couldn't get into them. Nothing against Venture since I have teamed with many in BoNS & Crux Prime and they can be a great asset.

Last but not least is my favorite battle suit....Bat Lord. I love this set, especially with Sorcerer Shoulder Pads or Engineer Shoulder Pads. It doesn't work well with Mosiac hat switching because the Disco Ball & Shield Rush are linked on cooldowns.

I've mainly played with Venture and Sentinel and sometimes Paradox.

Venture Daredevils are best at using their abilities rather than their weapons, as their weapons are slower to attack with in most situations. Fig on Fire works great at weakening your enemies for teammates, and the Fire Extinguisher is very effective when used against enemies surrounding you. Super Jump is a good way to attack.

Buccaneers I have less experience with, but their monkey distraction is helpful in escaping tough situations, like you want to leave Point Zeta on Crux prime but that dang spiderling won't stop following you-just use a monkey! Their repulsion ability repulses enemies, and Buccaneers appear to be better at attacking with weapons than Daredevils are.

Sentinel Knights, the only class of Sentinel I have experienced after Beta (was a Knight and samurai in late beta) are definitely the armoured tanks they should be, Despite their 2/3/3 weapon, that does not stop them from cutting through enemies quickly and their armour boost is a great asset in teams. It can save lives...

Paradox Space Marauders, the only class of Paradox I have experienced, are good at smashing weaker enemies in large group due to their splash damage guns. Rockets are good at weakening the larger enemies, and the shoulderpad ability of theirs is very useful to get out of tough situations. Their helmet ability, however, is overshadowed by the infinite firecracker The Big One which has a bigger range of damage and more damage.