I didn't understand if you want to play already done campaigns or want to do your own...
A bit of both?
For instance, a 'Battle of France' campaign is nice. But, it's pointless (to me) if a 'Battle of Britain' doesn't follow it in the same grand campaign that covers the rest of the war.
So, for instance, I'd like to build a campaign that sees I/JG54 start in France in May 1940 (or even Poland, but I don't know if that map has been made). At the moment, my DGen campaign for I/JG54 looks like this:
* Fighter (I/JG54 North).
Dynamic campaign for German fighter pilot I/JG54 (army group "North").
KurlandJun41 Kurland June 1941
KurlandJul41 Kurland July 1941
Estonia41 Estonia July 1941
TallinandLeningrad41 Tallin and Leningrad, 1941
Leningrad42 Leningrad, 1942
Leningrad43early Leningrad, 1943
Kursk Kursk
Smolensklate43 central sector, 1943
Leningrad44 Leningrad, 1944
KurlandJun44 Kurland, The Baltic Gap, July 1944
KurlandAug44 Kurland, Operations Doppelkopf & Caesar, August 1944
KurlandOct44 Kurland, The Russian Breakthrough, October 1944
KurlandNov44 Kurland, The Second Battle, November 1944
KurlandDec44 Kurland, The Third Battle, December 1944
KurlandJan45 Kurland, The Fourth Battle, January 1945
KurlandFeb45 Kurland, The Fifth Battle, February 1945
KurlandMar45 Kurland, The Sixth Battle, March 1945
KurlandApr45 Kurland, The Final Days
I'd like to add a Battle of Poland1939, Battle of France 1940, and Battle of Britain 1940 to the top of that list, if possible.
Anyway, you can search for mine at M4T, which are almost all for Asura's DGen (whose specific version required by the campaign is always included in the pack of my own campaign!). Here is a list of some for 4.12 and containing large maps:
Bataille de France (for ModAct)
Murmansk expedition (for ModAct)
Pacific War (for ModAct)
Cheers for the links.