Clairvoyance, for example, can include vivid dreams, visions, seeing auras around people as you look at them, or closing your eyes and seeing auras in the back of your mind. Furthermore, each person has all of these gifts, but to varying degrees.
So you may have wonderful Clairvoyance, good Clairaudience, but minimal Clairsentience and Claircognisance. Anothers may be extremely strong in Claircognisance but have little of any of the others.