I wanted to be a vet, and after I finished college, and started looking at vet school, I rethought it. I didn't think I could get in, had massive debt already, and really didn't like the idea of 4 more years of school at the time. I thought I would work for a while and then go to graduate school, but my first job sort of cured me of that. There are way to many personalities in the hard sciences, and fighting for grant money is a blood sport. More than one of the PhDs in the facility where I worked fit the description of "piled higher and deeper."
So I ended up working in basic research, environmental chemistry and drug manufacture as a lab grunt. I mostly worked in environmental chemistry, which I wouldn't want to go back to. Too many nasty chemicals, with too many unknown contamination levels.
I've been a SAHM for the last 12 years, and that's sticking fairly well. I still don't know what I want to do when I grow up, but am thinking about reentering the work force. You got any good suggestions for someone who has a 25 year old BA in biology?