Altruist a person unselfishly concerned for or devoted to the welfare ofothers
Veteran a person who has had long service or experience in an occupation,office
Epicure a person who takes particular pleasure in fine food and drink.
Recluse a person who lives apart from society, often forreligious meditation.
Gregarious (of a person) fond of company; sociable.
Skeptic a person who maintains a doubting attitude, as toward values, plans,statements, or the character of others.
Eccentric a person who has an unusual, peculiar, or odd personality, set of beliefs, or behavior pattern.
Sanguine optimistic or positive, especially in an apparently bad or difficult situation.