Its depends where setting the game occurs, like in some game with modern or super heroes settings i put my own name, this make a version of me in that universe but in other settings like samurai of hyuga who is in a feudal japan, i create a character with the name Musashi to honor the famous samurai and because it more akin to the setting.
I choose Arthur if it got a medieval theme and for the modern world I go with the name Tyler, also my heroic name in some is based on my gaming name eg Fear/Void. As for the surname, I prefer to avoid it if possible or else just a random one.
About the personality it depends, what kind of life the mc is living. I go either with an aloof persona or a playboy one, though it also depends on who am I talking with there. I mostly prefer to romance tsundere type of girls, so Iām acting seductive towards them and as for the playful girls I am stoic most of the time towards them.