In my opinion ideal age for gal is 23-26 and for boys it should be early 30s (30-34).
gals when cross 26 and boys when enters mid and late 30s, become too fussy and expectations are too very high. Expectations are not worldly i.e finance, status, cars, home etc but you look for the RIGHT person you want for yourself. and thats the MOST difficult job believe me.. i have crossed 26 :(