Floating is definitely a lifestyle - and will be acceptable to you or not depending on your personal circumstances. It has suited me very well indeed. I enjoy the variety and getting well acquainted with many parts of the country.
However, for me the main downside is contending with the UK traffic. I enjoy driving but hitting two jams in one positioning more times than I care to think about can get very wearing!
Your life is in the hands of the company rosterer. Flexibility on both sides is a must. But remember they hold the cards!
Also, consider where you live and how close to the company supported bases you are. Regional floating can help but is not necessarily a given.