Ok, so I’ve just started out playing and I ended up trying to figure out the difference between Gerund, Euston and Rhet. In the end I’ve decided to stick with Euston, just for it’s looks.
Also, Rokstedi gun. Reminds me Obeya from APB, except that this one’s much better and I love using it when I need some range
I don’t have a favorite medium weapon yet. I’ve been defaulting to the Euston just because it seems easy to use, but hopefully I’ll have time on the weekend to try out more of the weapons in detail.
I traded in my Euston for some spray’pray smgs since they seem to be the easiest way to kill in this game.
Im getting into bad FPS habits, where I used to stop, crouch, aim for an engagement…but in brink you have to fire from the hip while running around like james brown on crack to not get killed while engaging most of the time.
Still fun tho, I;m just gonna get owned if I keep these habits up in something like BF3. 
gerund and rhett all the way! they seem to be pretty accurate and do alot of damage. the euston has too much recoil imo.
the gerund rapes people from a pretty good distance if you can aim. the mossington is fun also if people get in your face, however i keep a pistol with me when i use the mossington so i can get some longer range action going if i have to.
I like my Rhett or Rokstedi for most encounters. For areas with lots of close-quarters I much prefer the mossington. I almost always have the Bullpupish SMG, forget the name, as my secondary as it’s my absolute favorite SMG.
Euston for me, Has a decent clip/max ammo size and from the stats does the most dmg for an full auto AR. Using the Bulpdaun Doom SMG as my backup and I am doing pretty well with the combo on most maps. The key seems to be cover, you get caught in the open then your going to get crossfired and go down quickly. Supressive fire and grenades are especially important to move up when attacking.
The Grenade Launcher ( can’t remember the exact name T.T ) and usually the Kross. Probably use this combo, or a similar one, the most.
Bulpdaun is great, but I don’t like his small ammo clips, which is why I usually prefer Kross to it, and Crab to Kross. The thing may have a bit of a kickback, but it’s worth it 
Also, whenever I’m using shotgun, I’m equipping either light rifle or a friggin revolver. The dame thing is a hand-held cannon.
The lobster is its name. I love that thing, too. Nothing like dropping a fat juggalo with a minigun on his back by hitting him with a nade right between the eyes.