I have got KMC Mangalore in 2nd allotment list. Should I join? Or should I take any private medical college from my state?

Irrespective of the state, I would suggest you to join KMC Mangalore. The only difference you mostly find in a government and private college is of the patient inflow (which can actually be very low in some corrupt colleges) and of the peer group(high ranked students mostly preffering govt colleges). A handful of private colleges defy both these points and KMC Mangalore is surely one of them. Good patient inflow,competitive peer group,good environment!Better than a random college anyday be it any peripheral govt or private.