Shakey-cam in the Bourne films (and in Star Trek) doesn't usually bother me. I find it leads to a sense of 'being there' as opposed to being held at more of a distance through static camerwork.
Or the general realism that Horatio mentions. I tend to prefer it nowadays on balance. It feels more naturalistic.
But it can go too far............Cloverfield I find unwatchable because there's too much of it. Which is a shame, since I think I would like it a lot better if they had just reigned it back a little.
'If the Apocalypse starts, beep me!' - Buffy Summers
'The sky's the limit.....' Jean-Luc Picard, 'All Good Things'
courtesy of Saquist