Mature, grown-up, old enough (with the implication that one can look after oneself and make one's own decisions).
Deserving, or having sufficient worth.
Having worth, merit, or value.
Admirable or honourable.
Suited; suitable; befitting.
To render or treat as worthy; exalt; revere; honour; esteem; respect; value; reward; adore.
A distinguished or eminent person.