I got a bachelor's degree before entering pharmacy school. I realized during my 3rd year of undergrad that I might like to continue on with school and so I started exploring pharmacy. I didn't want to waste the time and effort I had put into my BS degree, so I decided to finish it up so that at least I'd have the degree to show for the hard work! I was on scholarship so I actually didn't pay for the schooling, but I guess you could look at it the other way in that I lost an extra few years of working....but I wouldn't have it any other way because I have so many great memories from those years.
To me, it was totally worth it to get my BS. Like a few others mentioned before, I had a lot more free time during those 4 years to participate in extra curricular activities and meet lots of new people and just grow as a person in general. I have a degree that I can actually use on its own so if I ever become bored with pharmacy, I have something else to fall back on or I can always do both jobs part-time as another option.