Over the years hindi cinema has witnessed so many couples that its difficult to shorten the list to just ten, however I would like to mention that I haven't watched a lot of movies of 40's, 50's and 60's and therfore my ratings are from the pairs who starred in films in the last 4 decades....
10. GOVINDA-RAVEENA TANDON-90's(the dancing pair)
What I like about the pair:great dances, raveena the only actress who could match govinda
hit films:dulhe raja, bade miyan chote miyan
unforgettable songs:1.AANKHIYON SE GOLI MARE
2.KISI DISCO MAIN JAAYE
9.ANIL KAPOOR-MADHURI DIXIT-80's and 90's(the violent lovers pair)
What I like about the pair:compilment each other well,fabulous comic timing
hit films:tezaab, ram lakhan, beta, parinda, khel(not a hit but enjoyable)
unforgettable songs:
1.KEH DO KI TUM
2.DHAK DHAK
3.TUMSE MILKAR
8.SALMAN KHAN-KARISMA KAPOOR-90'S(the mischevious pair)
What I like about the pair:mischevious, enterataining, great looking
hit films:biwi no.1, judwaa, dulhan hum le jayenge
unforgettable songs:1.CHALTI HAI KYA NAU SE BARAH
2.BIWI NO.1
3.PYAR DILON KA MELA HAI
7.AAMIR KHAN-JUHI CHAWLA-late 80's-early 90's(the fresh pair)
What I like about the pair:fresh looking, great actors
hit films:qsqt,ishq,hum hain raahi pyar ke
unforgettable songs: 1.AE MERE HUMSAFAR
2.ISHQ HUA
3.GHOONGHAT KI AAD SE
6.AMITABH BACCHAN-PARVEEN BABI-70's and 80's(the electric pair)
What I like about the pair:looked great on the screen with amitabh
hit films:amar akbar anthony, majboor, shaan, khuddar, deewar
unforgettable songs:1.MY NAME IS ANTHONY GONSALVES
2.ANGREZI MAIN KEHTE HAIN
3.JAANU MERI JAAN
5.DHARMENDRA-HEMA MALINI-70's(made for each other pair)
What I like about the pair:their distinct personalities
hit films:raja jani,sholay,seeta aur geeta unforgettable
songs:1.KOI TAANGEWALI
2.KISI SHAYAR KI GHAZAL
3.ABCD CHODO
4.RISHI KAPOOR-NEETU SINGH-70's(the cutest pair)
What I like about the pair:the cutest looking pair
hit films:rafoochakkar, khel khel main, amar akkbar anthony
unforgettable songs:1.EK MAIN AUR EK TU
2.TUMKO MERE DIL NE
3-TERE CHEHRE SE
3.AMITABH BACCHAN-REKHA-70's and 80's(the contoversial pair)
what I like about them:carried their off screen romance on screen
hit films:suhaag,mr.natwarlal,silsila,muqqadar ka sikandar,ram blaram
unforgettable songs:1.PARDESIYA
2.DEKHA EK KHWAB TO YE SILSILE HUE
2.RAJESH KHANNA-SHARMILA TAGORE-70's(the romantic pair)
what I like about the pair:great songs, chemistry something to watch out for
hit films:aradhana, daag, safar, amar prem
unforgettable songs:1.CHINGARI KOI BHADKE
2.ROOP TERA MASTANA
3 AB CHAHE MA ROOTHE YA BABA
AND MY GOLDEN PAIR,THE PAIR I ENJOY WATCHING MOST IS
1.SHAHRUKH KHAN-KAJOL-90's(the golden pair)
What I like about them:anything they do turns to gold, their songs, chemistry, roles everything is unforgettable
hit films:baazigar, karan arjun, k3g, kuch kuch hota hai, ddlj
unforgettable songs:1.JAATI HOON MAIN
2.LADKI BADI ANJANI HAI
3.TUJHE DEKHA TO YE JANA SANAM
Well this is my list...and I have given my reasons for making this only out of contemporary stars....even then it was difficult to chose 10..farooque shaikh-dipti nawal, hrithik-kareena, shahrukh-rani, are only some among many whom I want to mention.