Boss probably was the inventor of Background Signature Tune in Hindi Film Music, which stayed throughout the movie, after and for ever....
My all time favourites, few are....
Teesri Manzil
Arjun
Sholay
Shaan
Deewar
The Burning Train
Kaalia
Betaab
Great Gambler
Hum Kisise Kum Nahin
As the theme for example check out Hum Kisise Kum Nahin....what a masterpiece??? And for situational music check out "Ram Naam" Music from Jeevan Mukt....exactly fitted the situation, but with a twist....completely played on harmonium and check out the percussion --> specially dholak and khanjani
BOSS never repeated himself and hence made such significant impact in our listening pleasure. All of HIS background scores truly stand out.
And very few can match HIS situational music that amazingly complimented each scenario....
Jai Pancham!!!