There was a solid month where a buddy and I owned this fucking game. He and I could do the airplane engine on three stars (That was the highest difficulty, wasn't it?) just the two of us, trying every engine just for fun.
Grinding happens, but you should do so with a friend. People that drop into your games could be good or bad, so find someone you can get along with and stick with them. Try different missions every now and then, just for the fun. You can pretty easily drop into four stores, jack the ATM, and be out in just two minutes.
Only bad thing about that is i have no friends....well that's not true i do have friends but none of them even have steam except one and hes such a tight wad he wouldn't give 6 bucks for a $30 game. so yea. im also playing a tank but i have never really even tried stealth properly.
To be honest, I would probably like it more if it weren't DLC: The Game. I'm all for additional content if it's worth it, but there's so much bloaty crap being churned out, and the compatibility updates are fucking irritating. I really dislike having to download 500MB+ a day for a single game, it's messy and annoying.
Besides that, it's a fun game. I prefer the first one though.
Have to agree with you on that one this game is a complete DLC fuck fest