Dr Chandra is described throughout 2010 as quite an introverted, very private person. He only seems to show emotion twice during 2010; first, when HAL is reactivated, and second, when he is putting SAL 9000 to sleep:

'...I would like ask a question.'

'What is it?'

'Will I dream?'

'Of course you will. All intelligent creatures dream - but no one knows why.' Chandra paused for a moment, and added something he would never admit to a human being. 'Perhaps you will dream about Hal, as I often do.'

Source: 2010: Odyssey Two