I am interested in learning unix and would like some advice on how I would start to learn unix.
Therefore,
What would be a good (free) unix distribution to install?
Would it be better to invest in a packaged Linux distribution (redhat etc) and get the feel for unix this way?
Are there any good tutorials/books available for beginers where I can try out and put unix to work?
First read the rules of the forums. Then look at the FAQ forum from the main page. You will find answers/suggestions to your questions. No one can tell you what UNIX you need - that is a personal preference based on your needs.
I understand your statement about wanting opinions - you will find them under the FAQ's and then you can search the forums and you will find more. That will give you a better understanding which should help you make your decision.