MS, good song.I liked Poonthottam very much - I think the director, kalanjiyam was his name I think, did a series of movies with IR - the music was increasingly good through this series but the movie hit rate was inversely proportional - vaasan was the lyricist for these movies. With Poonthottam, the series came to a halt as the hit rate dried up and to compound matters, vaasan passed away.
The previous efforts were Poomani and Kizhakkum Merkum. Poomani was the bigger hit((Empattu Empattu and ThoL Mela ThoL mele) bt KM had a coule of hum-worthy songs - kathum kuyilae by Sadhana and Ennoda Ulagam veru by Raja.
As for Poonthottam, have to agree with Udhaya. One of IR's best in the 90's. The synth interludes were such an irritant and stopped the songs from gaining the all-time currency for greatness.
Udhaya, I will give you a laundry list of IR's other Tamil movies, instaed :-)
1. Manasellam - I think most people didnt like it but I think you wrote a positive review in TFMPAGE.(Yeah, and I remember that:-)
3. Kaadhal Saadhi - movie was never released but you should hear it. I think you will certainly appreciate the songs in this movie. Others might dismiss it as a typical IR 90's village movie songs format.
4. Virumandi - Kombula poova suthi probably would fit in your themmangu series - though I know zilch about that categorization and hence may be wrong
Many more with atleast 50% good songs