I am a full-time, paid firefighter/paramedic for a municipal department in Indiana, not a volunteer. I won't go into stories or experiences.
You need to be committed to the job 24/7, and expect to see the dark side of folks, because you will. I went into this 28 years ago thinking how cool of a job it would be, and gee, I can help out my fellow man. Well, over the years, you see some pretty horrific shit. You also witness some miracles, and also become part of the best brotherhood in the world. I wouldn't trade what I have done for the past 28 years for anything, but a different career would have been easier on me both physically and mentally.
I have also been married almost 23 years, but it does take a special woman to put up with it. She needs to understand that when you get off shift and want to be left alone, to just do so. When you want to talk at 3am, then lets talk about it. Communications in the marriage of a firefighter goes a long way, just as in any other marriage. I also have 2 sons, and I spend all my free time with them. (I work part-time in the local emergency room, which doesn't help my cynical side).
We work 24 hours on duty and 48 off, which works out to a 54 hour work week over the year. You don't make enough money for what you have to do. We train a lot, both in fire skills and EMS, and average 10 calls per shift, so we do not sit around and play pinochle like the public thinks. We do have down time, and get to sleep at night, but it is rare that I get more than 4-5 hours of sleep in that 24 hours. I am 50 years old, and it is taking it's toll on me physically. (I can still outwork a kid 1/2 my age). I'm gonna retire in a few more years.
If you are thinking of a career in this field, volunteer somewhere first. Go to EMT school and see if you like that.
If you don't mind being puked on, endangered during a domestic fight, bled on by someone with Hepatitis C/AIDS/HIV, running into a burning building when the rats are running OUT, telling an 80 year old woman her husband of 60 years is dead, carrying a 2 year old drowning victim to your ambulance KNOWING he/she isn't going to survive. etc, etc., etc... then this career could be for you And that could be all in one shift.
Bob