Marriage - I've been single for 5 years, and adamantly stayed single, to the point where I've been in a couple of longer term "relationships" that I've simply cut off in pursuit of other things in life. In reflection I feel this may be a quite cynical outlook on life and will probably change in the near future.

Children - I wrap it.

Pets - Don't have the time nor want to spend the incredulous amount of money required to maintain one.

Elderly Relatives - All of my grandparents have passed and my parents (who are almost in their 60's now) are generally in very good health. I guess I'm very fortunate.