I don't remember the 'changes right after we were married' too much anymore...we'll have our 5-year wedding anniversary this coming August. Neither of us really wanted to get married, but it was a legal necessity due to the transatlantic romance aspect of our relationship - in order for us both to be together in the same country. If not for that, we'd probably have been long term partners rather than getting married -- for me, because I was married unsuccessfully twice before, and for DH - because I was married twice unsuccessfully before (lol!) and also because he didn't see the real NEED to get married. His brother & brother's girlfriend have been together for years & years, and they're not married and have no plans to.
But you know what, we are both so glad we did get married! I know five years isn't that long, but in each of my previous marriages, I was in divorce court before five years rolled around. And with us, we are just as much in love and probably even more so actually, than the day we married. Mostly what I remember about changes after marriage, with this marriage, is that it's just got better & better as time has gone by.