Who wants to kneel on the ceramic tile floor to pin baste? Your knees will be hurting. I also know that your legs will ache if you spend a ton of time standing and walking on ceramic tile.
Like Karamarie, I also have various flooring throughout my home. When we built we put a high grade of carpet in what is now my sewing room. I have no trouble finding pins....I could use a magnet if I did.
However, whatever you decide, I would also recommend the Sharon Shambers method of basting a quilt...whether it be for hand quilting or machine quilting (find it on you tube). It does take a bit more time but your quilt sandwich is more stable and won't shift. You can then baste your quilt on a table and not kill your knees on the floor. I have done it both ways and I will never kneel to baste a quilt again.