I wouldn't because I like my life so I worry about a Back to the Future style issue.
But I do wish it was possible to check out another trouser leg of time. I'd see a man I turned down at university. I was an idiot.
There's a great bit in one of my namesake's books where a man is reminiscing and talks about 'what if we had married?'. The woman says, 'yes but what about the terrible fire that swept through our house?' Because you just never know.