My wife and I have always had joint accounts but it sounds like my situation is different than most here.
1. I'm extremely cheap when it comes to myself, I absolutely hate spending money on anything for myself personally. But I'm perfectly happy to have my wife spend money on herself or the kids, it's kind of the point of me working.
2. My wife makes more than I do, always has, always will. This is a great situation if you can get into it.
3. I hate micromanaging things like money but she loves knowing about where everything is going. I'm at the point in my life where I'm blessed enough to have enough money I don't worry about it at all. I put a good % of my income directly into a 401k, some in 529's, and then the rest just goes directly into a bank account. I don't know the balance of that account. I don't know how much my actual paycheck is. I just roll along in life blissfully ignorant. I also can't really remember the last thing I bought for myself more expensive than a burrito from Pancheros. I drive a 2011 Toyota Highlander.
I don't think my wife and I have ever fought about money other than the time when we were first married and I bought a foot long from Subway and ate it, I was still hungry, and bought and ate another foot long. She thought we were double charged and I had to explain I ate 24 inches of sub sandwich. I think she was more disgusted with the eating habits than the spending but wasn't particularly happy with either.