Jeff,
The answer to your question lies with your fiancee's and your convictions and understanding of what the purpose of marriage is, combined with many other factors, including but not limited to your collective ability to handle conflict productively (i.e. are the two of you prone to escalation?), your common interests together, sense of humor, the examples your respective parents gave you during your upbringing (which on the surface based upon your comments seems good).
A few questions:
1) How long have you two known each other?
2) When you disagree, how do you handle it?
3) Have you had any premarital counseling?
4) Have you attempted to work through some of the fundamental issues like money, time, career goals, life goals, children?
5) Can each of you compromise on what you want?
My W and I started dating when we were in freshman year of college when we were 17/18 years old. We dated all through college and got married when we were both 23. Neither of us handle conflict or compromise well, so our marriage has been rocky and we've had to really change a lot individually in order to make things work. The best advice I can give you regarding marriage is this: There is no right or wrong between the two of you, there is only what works. The old adage of being right or being married is an accurate one in my experience, you have to prioritize the marriage over your individual wants and needs at least sometimes, in order to have a good relationship. Friendship is important as well, as the infatuation period wears off you'll need to be living with someone you can tolerate and enjoy being with on a daily basis.
