When we do argue its usually minor and due to differences of opinions search for conflict resolution. The last argument we had was whether we should kick the daughter out of the house. We spent less energy on that argument than I probably spent choosing what to eat for lunch, which is strange considering the severity of the subject.
The last serious argument we had was about 22 months ago when she got another dog without asking. Somehow I guessed the subject exactly when she started the conversation with: "Don't be mad..." I was livid. I told her if she wanted to keep the dog she had to name him "Gay Fish" (South Park reference). That never happened. What can you do when you haven't seen your spouse in a year and are on the other side of the planet? In hind-sight things are pretty healthy if that's the most serious of arguments.
The thing we disagree about the most is that I cannot arbitrarily quit my high paying corporate job where I literally do nothing. Although I hate being bored and so many of my coworkers (not just at the current job) are incredibly insecure and exceedingly sensitive my spouse is adamant I need a good reason to enter a different line of work.
After all that its funny, in a very sickly schadenfreude kind of way, to see the curiously trivial absurdities or bizarre self-serving behaviors other couples destroy their marriage over.