The preference of a specific fire depends very much on the situation and needs of the user. If gas is available, do you value the advantages and authenticity of a gas fire? Do you think a variety of styles is important? Then a gas fire is the obvious choice.
If gas is not available, but having a pleasant atmosphere in the home is still very important, an electric fire is probably the best choice. Even if gas is available, an electric fire can be a good choice, as shown in the advantages of an electric fire above.