Good salmon has a wonderful flavour on its own, so I tend to cook it simply. I like taking fillets, sauteeing them in butter (fish side down first, then flip and cook the skin side), and serving with a squeeze of lemon juice. I love crispy fried salmon skin! I'll serve it with rice, salad and steamed vegetables for a simple dish.
I also love salmon sashimi, but you have to be careful about the quality of the fish if you want to make it at home. Salmon is much more prone to parasites than other types of fish used for sushi, because it is partially a river fish. In the US, fish for sashimi must be flash frozen to kill parasites.
One of my absolute favourite, but rarely enjoyed salmon dishes is whole stuffed barbecued salmon, done with a smallish fish. However, this usually requires catching your own fish as the first step.
I use dry smoked salmon in pasta dishes (the dry smoked is cooked as it smokes, and has a stronger smoky taste than the raw lox style), tossed with asparagus, dill, and a light cream sauce.