The differences mainly stem that I signed on the dotted line as a single guy in college.  Now, I'm in my 30s with a family.   
  
Things I hadn't considered as positives: 
- Health care for life in retirement 
- The retirement cash flow 
- Vet's benefits for myself, wife, and children 
  
Things that I used to not care about, but now matter quite a bit: 
- How much I'm home 
- Missed birthdays/holidays 
- My kids being able/unable to get to know their grandparents 
  
...to name a few. 
  
Don't get me wrong:  When I was 20, I didn't think that a career in the military would be a cakewalk.  Now that I'm watching my daughter grow up (way too fast!) right before my eyes, I think hard about why I do what I do and whether or not it's worth it. 
  
It's still worth it, of course.  However, it's definitely NOT your normal civilian career. 
  
If my pay/benefits were changed to reflect what's "normal" for a civilian career, you bet your ass I'd have to re-evaluate my current plan to give 20+ years of service.