Any campaign written by PhilK or compans is a quality bet. compans 'With 32 Squadron in France' is one of my all-time favorites, flying a Hurricane MkI during the Battle of France. There are Kanalkampf and BoB campaigns which follow it, as well as 'Under the White Rose', following 609 Squadron in 1941-42 as the RAF took the fight back to the Continent.
PhilK's campaigns are pretty well excellent, whichever you choos. IIRC, he was the author of the 'Hell In the Pacific' series, which features the player as a Corsair pilot flying ground attack in support of USMC landings. There were four - Peleiu was one, and Iwo Jima another, the locations of the other two escapes me at the moment. All are available for download from M4T 8)