W.E.B Griffin reminds me of Chipotle (the Burrito Restaraunt)--I like both, but neither has much effective variety. You can make lots of different combinations, but from a limited menu of options. I'm currently reading his "Presidential Agent" series, and there is a ton of re-used elements:
*Wealthy man is in the military or police even though he doesn't need the money. (Badge of Honor, The Corps, Brotherhood of War, Honor Bound)
*Wealthy Main-line Philadelphia (Badge of Honor, bits in other series)
*Long lost relatives in different countries are reunited, everyone is wealthy. (Honor Bound, Brotherhood of War)
*A successful (and usually wealthy) ladies man falls in love with an inappropriate woman. Turns out she's madly in love with him, but has been afraid to admit it. They allow the affair to continue, even though it jeopardizes a high-level mission if they are caught. (Badge of Honor, Brotherhood of War, partly in The Corps)
*Famous Grouse Scotch (The Corps, and I think others)
It is hard for me to separate the distraction of repeated bits from the story, but I don't think this is one of his best.