Go Payday! You infuriating, untutorialised nightmare you! I guess discovery is part of the fun, even if that discovery is through being kicked from public games for not understanding the stealth mechanics. (I think I have 40 hours and I still don't quite get it). I got in last free weekend and have not stopped since.
Hot tips from a massive noob nobody asked for:
-Don't buy any assets. The second you put your own money into a heist you guarantee someone will screw it up within 2 minutes. Especially on the stealth only mission. Those level 100 guys you just grouped with can buy them for one fraction of a percent of their piggy bank, let them do it.
-Second Screen. The missions are complex, unless you want to work them out the hard way (Which is probably fun with friends) have a wiki up on your phone/second monitor.
-The missions are randomised, vaults, camera rooms, guard and camera placement, civilians. It's kind of awesome. The game wants you to fail. Never take anything for granted.
-If you play PUG's expect to fail. A lot. I think we blow 9/10 missions... but a big payday with a good crew will net you millions. Keep at it till you MM with someone decent, watch and learn if you are unsure what to do, run bags, watch the street, control civilians.
-Get the armoured car missions while they are cheap, they have decent pay, are not too hard on lower difficulties and are straight out shooting. Might have to level up a bit to get some armour but otherwise they are a great place to learn the basics of interacting.
-Don't start a server without a level limit then complain about noobs joining and wrecking the game.
-Don't proselytise Payday 2... wait...