It's nothing more than a slight nuisance because I have to update the older clocks throughout the house and the clock attached to the microwave and refrigerator and alarm clock...
Some newer versions of those automatically update, but I'm not wasting money to go around replacing things I've had forever that work just fine.
Anyway, outside of that nuisance it really doesn't affect anything except for people who forget that the time has changed and they end up being somewhere an hour early or an hour late (whilst this doesn't happen to me, because I am good about this sort of thing, it is a problem because it happens to most of my friends when we are supposed to meet somewhere to go shopping, etc.).
I think that they should just get rid of the DST altogether (for example in places like Australia that don't observe DST). It would make things much easier, because I could care less about how precisely we keep up with the Earth's rotation, lol.