Grilled Salmon with Rosemary

According to wikipedia, salmon rich in protein and omega 3 which are important for brain function and structure among other things.
I hardly buy it because it is tasteless and sometimes hard (if over cooked) and a bit pricy too for the fresh one, except for those which are already kept in Costco's freezer for months.
This is just one of try-out-my-own-creation. I dunno where the idea come from (perhaps from grilled lamb with rosemary in Sizzler or else?). However, it turned out "not-bad" with rosemary and lemon flavor.
And this is the way how i do,

- Marinate salmon with 3 tbsp of lemon juice, 1 tsp minced garlic, pinch of sugar, chopped rosemary, refrigerate for 1 hour, turning each side for 30 mins and grill until done, sprinkle with black pepper or any grill seasoning.