Tight is one thing and a NIT is another.
I think a tight player probably averages a 15%-25% voluntarily entering pots. A NIT probably only plays the top 5%-10%. A loose player probably averages 25%-35%. (My opinion only.)
Aggression is about what you do when you enter a pot. Being passive makes it real tough to get value on your good hands. Being aggressive allows you to make the most of your good hands and allows you win some hands you may not deserve.
It is possible to win playing any combination of these styles, but you need to understand each styles weakness and strength, and more importantly, when each style is best used.
It is clear however that waiting for QQ, KK or AA to play a hand is not a good recipe. You will have to wait an average of 70 hands to see one of these, and when you do see it, it is not a guaranteed winner anyway. If I were playing you and you didn't play a hand in 70 hands and then you suddenly bet, I would probably fold and let you win the blinds. You have paid the blinds 7 times, and won them back once. Pretty tough to get ahead with this formula.
Good luck and God bless