Each man has different reasons for getting married. Some common themes include: having a partner to share life experiences with, become fully committed to another person and creating a happy family life.
The Huffington Post describes some of the things men are looking for when they get married. Many men are happy to have someone to share the ups and downs of life. Improving oneself becomes easier with a partner at one's side. Men with these desires are looking for a partner who will share and encourage them when needed.
The commitment aspect is important to many men as well. Having someone be there even if things get really difficult is valuable for men looking into marriage. Its also important to have another person there to accept the partner for who he really is. This genuine acceptance and security is another key element for those men who want to get married.
Many men did not have great home lives while growing up. For some, marriage is an opportunity to create the sort of home life which was absent earlier in life. Partners who are willing to contribute and strive for that idealized reality are particularly appealing for men interested in marriage for this kind of reason.