Sales & Marketing - In India, many of the non-tech skills are hard to come by, as many smart minds end up becoming engineers.
In the valley, the alumni of successful startups form the seed for the following startups. The Fairchild alumni, Google mafia and later Paypal mafia (http://en.wikipedia.org/wiki/Pay...) invested in 100s of startups while also lending a lot of support. In India, such mafia are completely absent.
Venture investing is still in very early stages. When guys of the caliber of Sequoia are investing eye hospitals and retail chains, you have to realize how weak the venture system here is.
Family pressures are high, as Amit mentioned earlier.
Peer pressure is far more visible in a connected/gossip-loving society like India's.