[MannoFr]

As narayanan Has Pointed out Deva has given excellent songs for the 'larger than life ' Superstardom Image Of Rajini. But till he reached this point Raaja in complete 80's and early 90's and probably MSV in early 80's were the Ones who were experimenting with all kinds of songs for him. You can see a Dappankuthu or a disco or a pure melody like 'MalaiyalaKaraiyoram' for Rajini's Intro's. But still Rajini Intro songs were not a necessity then.
Thalpathy should have marked the Arrival of Rajini Being Introduced thro a song But it was not a necessity still. 'Mannan' or 'Veera' didnt have the typical Intro Songs as we see in todays Rajini Movies. Even then IR was experimenting with a 'Ulakathukaaga' in paandian-a typical MGR Intro Song alike. 'Ejamaan' had a 'EjamaanKaaladi' which was way too different for a rajini movie and 'Uzhaipaali' had 'Uzhaipaali Illatha'.
Analysing the songs IR gave for rajini We can naturally come to a conclusion that IR was not stopping anywhere with kuthu songs for Rajini and he was experimenting always.
But Deva knew what was right for Rajini. He just grabbed the oppurtunity and On the lines of 'Pothuvaaga Enmanasu' composed 'Vanthenda Paalakaaran' 'NaanAutokaaran' 'AthandaIthandaa' And established that a rajini intro songs should have SPB and Folk Rhythms.
ARR was a bit behind and started experimenting late but his songs were good too but it was not the right time. Muthu and Padaiyappa were great but 'Dippudippu' with the voice of SM and punjabi rhythms was never welcomed by RajiniFans here in TN period.
And i can only laugh at the sweeping statement like 'IR never experimented and Only ARR experimented'.
Rajini's songs were sung by MalaysiaVasudevan[Pothuvvaaga, Aasainooruvagai], SPB[Rakkamma,RajavukkuRajaanaanthaan], Yesudaas[AagayamMelae], Mano[EnnodaRaasi,EnkittaMothathae] and even Arunmozhi[AathulaAnnakili] at times.
Vishayam theiriyaatha ARR Fans are like Poonai's who keep their eyes shut