Agreed on the dipset love, I still maintain Purple Haze is one of the best rap albums of all time (top 5 for me just because of how often I still listen to it).
There's been a lot of good releases lately.
Fat Trel - Nightmare on E Street - Trel is awesome, great beats, good riding music/
Zilla - Zilla Shit 2 - If you like that Huntsville scene you will like this. Smooth southern shit with great production (as per usual for Huntsville rap)
Trouble - 431 Days. This is GANGSTA. If you like authentic, grimy Atlanta trap shit you will like this. Trouble's demeanor is so gangsta. I recommend the track "World Goes Round" from his last mixtape if you want to get an idea of what he's like:
http://www.youtube.com/watch?v=dpKV2Wn96rA
The new Boldy James mixtape, Consignment is great if you like that grimy midwestern drug slinging music. He's from Flint Michigan and again, great production (think cool kids)
If you like your rap a bit more ignorant the new Chief Keef and Gunplay tapes are great. Gunplay especially if you like rowdiness.
Newest Big KRIT and Action Bronson are excellent as well, but I'd imagine most people have heard of those.
If you like music to do drugs to, listen to any Spaceghostpurrp or Lil Ugly Mane.
All of these mixtapes are free, you can find them on Datpiff or Livemixtapes.