Comfyshoes -I was a product tester once and I agree that it was really fun. You not only get the free product but you also get compensated for it as well.
Companies like Pinecone Research, Maritz Research, and Informa Research conduct these types of studies but I am sure there are millions more.
I know that there are people that have QA tester jobs for a specific company and get to test items all day long.
I recently saw a show about this man that was an ice cream tester. He would put the ice cream in his mouth and then have to spit it out in order to clear his palate so that he could try another flavor.
I think that after a while it would be hard to tell the difference between flavors but this guy really knew what he was doing. It looked like a fun job.