I don't even think you have to like kids to do this job well. I am sure there will be plenty of those who disagree. But I can tell you that I am the type of person who has always excelled at ANY job I have ever done. I take great pride in my work. I believe there is NO sense doing anything unless you do it well and to the very best of your abilities and belief system.
I don't think you have to love or even like kids to do this job well. Sorry, but it's the truth. I know many other professions and jobs where you can still do a great job but not like the product or the people you serve. I think in ANY job 90% of it comes down to work ethic and pride in doing a great job.
I do this job for MY KIDS. Plain and simple. This job works for me and MY family. And I have no qualms admitting that. I think any mother who works outside the home would also admit, if she were truthful, that the only reason she works is because it works for HER family (in that it puts a roof over their heads and food on the table). So, just like anyone who has their motives for working I chose daycare because it works for MY family. And at the end of the day that is all that really matters.