You do not have to be a UK citizen or live in the UK to be eligible for a Title. These Titles are more in keeping with historical Titles issued in those countries, but it is of course your decision, all are legally equal and valid. This is the best option for a person who wants increased social standing at a reasonable cost. A title will obtain you the best seats at restaurants, upgrades on airlines and VIP service at hotels. It also has the ultimate snob appeal and will open closed doors in the business and social arena.
British titles are land-based.
The same principle can legally be used to adopt a French or German title, but under the British legal system. If your government will not accept such changes, you can acquire a British Driving Licence with your new title, and use that as ID to open bank accounts etc. Change your cheque books and credit cards. Print your title on visiting and business cards. Quote your title when attending high society events.