Wow..I've seen so many examples of good and bad marriages in my lifetime. More bad than good unfortunately. My mother has been married 4 times.. She isn't a believer and she tries to fill that void in her life with men, therefore marriages always fall apart. I've seen some marriages out in the field here that are also bad. People who are so 'focused' on ministry that they completely ignore their spouse/children. I've also seen some wonderful marriages both in and out of the church.. I just continually pray for these people, and that God will allow me to learn from these examples.
All I know is that when a couple keeps the focus on God, and have a genuine love for one another, mutual respect and all, the marriage is a success. Yes there will still be disagreements/problems/trials and such, but when you're mindful of giving God the glory and not yourself or your circumstances, everything in your life will tend to fall in the right place. I hope and pray that when God blesses me with a husband I will still continue to seek out God's glory! (together with my man!) Woohoo!