Realistically, without being greedy £140,000 would make me happy. It would pay off my mortgage, and buy me a new car and a new bike. then i would only have to work for money for the bills and food, which meant i could do whatever job i wanted (like zookeeper) and not have to worry about whether i could afford to live off the meager wages that fun jobs pay.
however, i would LIKE to win millions so i can give loads away.
A few weeks back I found a fiver in a book (I'd been using it as a bookmark). To be honest that made me quite happy even though it was a small amount of money and mine in the first place.
To answer the question another way, having my student debt (both undergrad and postgrad) wiped out would be good and a large deposit for a modest terrace house would be even better. So £100k would be very nice.
Pay off my student loan, my graduate loan and enough to cover fees for my PhD if i don't get funding. So, about 20 grand would be right to set myself up for life. Can't drive, am happy with my bike and have no urge to get on the property ladder at this stage.