Goa: Chennai-28 had a good mix of a great story and lots of 'kalaai'. The 'kalaai' was icing on the cake that made you go 'wow'. But the story was everything. Goa is just 'kalaai' and no story. Agreed that some of the nakkal was totally awesome. However, after a while the movie is unable to ride on just the 'nakkal' part. In fact I'd say that Venkat Prabhu wasted too much 'nakkal' on this movie and could have spared it for some other movie.
Thamizh Padam: I was super impressed with this movie. As a spoof it is easy to be superficial and stop with the obvious. But like Hot Shots, this is not only a clever movie but very wicked. I laughed out so loud during several scenes. Its a tragedy that this was released the same time as Goa because they carry similar themes. It is also a tragedy that the two movies were not combined and made into one better product. Some of subtlety in Thamizh Padam is waay too cool. I never thought I'd see this sort of nakkal in thamizh movies. Certainly recommend this one.