I would say it's closer to a perfect mixture of both. When I begin to interpret the whole chart, I begin with the Trinity, which is made up of the Sun, Moon, and Ascendant. So those positions usually have a little more weight. Aries and Cancer are both what are called cardinal signs of leadership, so you do have goals, and like to achieve them. Aries loves to have original ideas, but needs the Cancer to have the patience to carry them out. The Sun sign is strong, but so are the Moon and Rising sign. So I agree with your very good analysis! The Aries Mercury means you compete with other people in an intellectual way, and Aries Sun makes you just plain competitive. Aries and Cancer are both friendly in their own ways, Aries is outgoing to most people, Cancer takes longer to get close to others. The Taurus Venus is nice here, a romantic and sensual touch!