Yes, patience is the key word. Cats differ in their need for affection and attention, just like people. Minnie may not ever be a "snuggler"; could be it is just not her personality.

I suggest that when you read in the basement near her that you read aloud so she can hear your voice and feel like you are talking just to her. I have spent many hours just reading nursery rhymes and singing lullabyes to my June feral rescue, Muskrat. She, too, was more frightened rather than aggressive toward me. She would cower and threaten with flat ears, hissing and posturing, but never once has she swatted a paw or tried to bite. I would put my hand in her cage and leave it there motionless as I read or sang, allowing her to decide when she felt comfortable in seeking my touch. It worked, and now she loves to be petted, scratched, etc. However, when I pick her up she still does tense up and burrow close to me, claws and all . . . That's OK . . . she is my baby.

Love and devotion toward a cat is half the battle, so you are almost victorious . . . hope this helps bolster your confidence.