You don't want to go 55, then 74, then 60, then 80.
How do I store my own wine at home? With a sub-zero wine unit. I live in Manhattan, so not a lot of room. So I've got a 100-bottle wine rack, temperature controlled, 59 to 62 degrees. Everybody likes to keep it at 55. I like a little warmer.
The most important thing in storing your wine at home is consistency. I'm not so worried if it's 55 degrees or 60 degrees. You just don't want a lot of bouncing around. That's what wine doesn't like. I don't like anything, really, over 70, 72 either.
So those would be the two things. You know, quiet, calm, damp. A little humidity wouldn't hurt the wine, but definitely, definitely temperature controlled in that 50 to 72 range consistency. If you have a basement or a garage, as long as it's bouncing five or six degrees, I'm okay with that. I just don't like those 15 degree swings.