I'm a little unsure on the question. But during sex we are 99% of the time naked, and often in the dark so sight is deprived making it more thrilling. (And also because I am self-conscious.) Touch is really important with our lovemaking, lack of touch also works because when sight deprived, you can't tell where the next touch is going to come from.
Sound is also important. I like to know that he is enjoying himself, and I would dearly love for him to be more in to dirty talk, but again, utter silence can be equally as thrilling if I think of us needing to be quiet (addrenaline rush! Remembering when we would have sex at his mothers house, etc)!
Sight doesn't do a lot for me on it's own, but sight deprivation should have it's own merits!
Smell doesn't do an awful lot, however, I can tell if he is enjoying it if I can smell his scent or fresh sweat on him. I like the smell of myself when I am on the edge, also. Not really a turn on, but it is a scent that I associate with being turned on.
Taste, nothing really.
I have been able to orgasm from thoughts alone, but not sure if that is what you are asking.
And I'm not sure if imagination should be catagorised as a sense here either... Hmm!