Picked it up today on the Franchise sale. Debating which DLCs I want.
-Big bank
-Armored car
-Hotline Miami
-Sniper
Any thoughts?
Hotline Miami a lot of people still play. The Big Bank and Armored Car ones not many lobbies are up at the times I play anymore, other then the computer generated community ones. The Big Bank is that,.. its really to big and unless you have a really good experienced crew your gonna be on that mission for a long time. Armored car heists take a while as well unless your entire crew have C4 and quick lock picking skills and/or saws. Its nice that you can carry a saw as either a primary or secondary now as well.
Sniper one is okay, only real sniper rifle I have ever used is the Thantos and thats really just to take down shields and bulldozers. 2 shots with it and a bulldozer is dead.
Hoxton breakout is fun as well, but I really like the latest, the heist the Diamond. Like it was said above though, not much reason to buy it just yet because everyone is still playing them a lot and there are a lot of lobbies to choose from. Its also one that you better have people with mics though, especially if your playing it on deathwish or overkill. The last room where the diamond is has a puzzle, and it takes 2 people to complete when on overkill or deathwish because it resets like every 40 seconds. So you can't write it down like with Hard or normal then run through it solo. That is unless you have a good memory, which I do not have.

It can be done going loud,.. but its a non stop rush of enemies and can be a real bear on deathwish.
Also, yes, as others have said courier mod is a must if your starting out. It will build up extra mods for your guns so you won't have to spend your hard earned (stolen) money. Just run around the maps looking for packages and in no time you will have a ton of extras. Once you learn the maps you know where they spawn and its easy loot.