Bread and Butter Weapons

Claymore

'nuff said

Best guns.

SMG. Hurricane
Shotgun. Claymore
Sniper. Black widow
Handgun. Talon
Assault rifle. Lancer

SMGs: I always have an excess of SMG amps, so the Hurricane gets a fair amount of use on power classes. Yeah, it's boring and OP but it helps scrubs like me survive Gold

Pistols: I take the Acolyte as a sidearm on just about every character unless I'm using a pistol as a main weapon. Very useful for Banshee/Praetorian shields, and Phantoms of course. (Unfortunately, half the time I forget I have it...) Arc Pistol is my most-used main weapon pistol.

Shotguns: Wraith is my standard Gold shotgun. I prefer the Crusader and Claymore, but only on specific characters.

ARs: Saber is always good, Lancer too. The Lancer is good on both casters and weapon-focused characters. I have a bit of trouble with the recoil but it's nothing that can't be fixed with a stabilization consumable (or turian!)

SRs: none of these is really a bread-and-butter weapon because I only really use SRs on one character (points at avatar). Valiant is my favourite. I have the Black Widow at a higher level, but I prefer the feel of the Valiant by far.

Mah Claymoar goes through the enemies' heads like a hot knife through butter. Is that what you meant?

My coin flip was different: 




2 Face is confused now 

CSMG on Prollector is fun. But otherwise I don't like too much as it overheats much faster than Lancer. 

I find that with extended mag and short bursts that it does quite a bit of damage and frees up the need for ammo boxes

Lancer, best AR other than Harrier and PPR which I consider OP.
Claymoar, because Claymoar
Acolyte+Collector SMG, best combo for power kits

Geth Plasma Shotgun, I love it. It's really powerful and it's range and ammo clip is very nice as well.

The second one is the Reegar Carbine, I love this one as well but here the ammo capacity is a let a down and also the range, it's only good as a close up second backup weapon.

1. Warp ammo
2. Biotic powers
3. Asari Dash