changing a personality for the sake of dating is a mistake.
he needs to find someone compatible who appreciates his personality, and will draw out the best in him, not try to change himself for the sake of others. it is important, however, to be sure that he has good dating and communications skills–even if hes not talkative, he has to know how to carry conversation, and overall show that he knows how to treat a girl. it is important for him to know that girls need to see initiative in him, and a certain masculine strength/direction,etc…..a girl needs to feel taken care of, not that she has to be the leader of the two because he can’t get his act together. a person doesnt need to talk a lot to accomplish this, its a social nuance that most people can pick up on.
from personal experience, i’ve been out with guys who were quieter than me, and that didnt bother me per se, as long as what they did say was intelligible, intelligent, and made sense–i hate when guys act shy, mumble, and dont make eye contact. being quiet/thoughtful/introspective/or say things in few words is one thing; not having social skills is quite another.