You should love it. Entry-level jobs that you can love are hard to find, but they're there too -- it's just more likely that you're going to need greater challenges more quickly. For instance, I originally loved my job at Wal-Mart -- I was 16 when I started, I got the physical challenge of throwing freight, and I got the mental challenge of helping people with their fish problems. It was very satisfying to me because I know fish very well, and it gave me a chance to really help people who appreciated the help. Four years later, it was to the point of tolerating, and it was time to move on to new challenges. You may not love every aspect of some of the lower-end jobs, but the overall feeling should be positive.
Chances are, you will spend about 1/4-1/3 (and 1/2 for some people) of your life at work. Do you REALLY want to just tolerate such a huge piece of your existence? Not to mention, dissatisfaction in the work place often leads to issues at home because you're not happy and fulfilled, which then radiates negativity into every facet of your life.