Welcome to allnurses!
I began my training 15 years ago, and can say without hesitation that it's the best decision I've ever made. Every day I get to: make positive differences in people's lives, teach, and learn.
I work in an acute tertiary hospital - that means the patients are among the sickest in the state; I work on a medical specialty ward, and so get a lot of variety with my work. Tonight my patient load includes a day 3 renal transplant, a palliative patient, two people with acute confusion, someone with septic shock, and a newly-diagnosed diabetic.
I work full time, predominantly on nights; I work some public holidays, but get time off to make up for it (6 weeks a year, but that's in Australia). I don't have children, but I have enough time to have a life as well as work.
The best nurses are those who can prioritise, think on their feet, put things together quickly, stay calm, and multitask. Maturity and common sense also go a long way. However, we come in all flavours, and the qualities you need depend on the area in which you work.
One of the advantages of nursing over other caring professions - apart from the fact that you get to actually deliver consistant care to a group of patients and see the results of your intervention - is it's flexibility. You can work anywhere in the world, in pretty much any setting - there's something for everyone
What keeps me coming back is the privilege of nursing - you will see people at their most vulnerable, and at their strongest; discover qualities you didn't realise you posessed, and assumptions you didn't realise you made. You will see things most people never get to - birth, death, triumph, joy. The best and worst in people, including yourself.
Depending on what your major focussed on, you'll also find a philosophy background useful: medical ethics is booming, and there are issues everywhere. There's something really satisfying in being able to apply theory to a clinical situation, and I believe that philosphical differences in perception account for a good half of the issues between nurses and doctors; having the language and awareness to articulate that is helpful.
Hope this helps!