I haven't been salmon fishing since I moved to Ontario (I'm originally from BC), but so far for me, nothing beats the mighty Chinook. :-) Never trolled for them though, always just cast from shore. Takes a bit of time but hugely rewarding when the line starts peeling off the bail. The one in my avatar was actually taken in Ketchikan, Alaska on a blue and white 1/4 oz. Buzz Bomb, and took me a good half hour to land...
Pinks are a lot of fun too, they're easily the most aggressive of the Pacific species. Throw a simple little pink or yellow feather jig in front of them and you can spend a whole afternoon getting strike after strike after strike.
As far as Ontario goes, though, I've really enjoyed just fishing for bass and panfish. There's a few places around London that are easily accessible and give pretty good sport. I really do want to get after some lake salmon/steelhead sometime...