He is definately stronger in writing ballads, darker songs.
One of my all time faves are: BIA, Basil, STP, RATR, Nobody's Child
What did not work that well imho: Blues and stuff like Heavy up, Ticket to Heaven.
It is somehow not his style. I like it, but it is not MK. Like Chet Atkins said: "Pretty good, but you're not Mark Knopfler"
Of course the old Straits stuff "Rockers" are excellent too: Tunnel,TR, SOS,MFN, Industrial Disease