ALL jobs suck if you are a grad and not planning to stay, cos you're winning credits you'll never get to cash in.
ALL grad entry jobs in EVERY industry and at EVERY employer, are about...
1. Working really hard to show that you are not work shy
2. Learning as much about everything as you can to show you are capable of learning new stuff quickly (and not from books like at Uni)
3. Getting to the point where people finally think that you are an individual rather than just another grad - which normally happens when you start "contributing" more than you are "consuming".
Any grad that does not enjoy their work is unlikley to find the above much fun, or find it easy to put the effort in. Thus starts the vicious circle of "hate this, can't be bothered, poor performance, bad review, hate this, can't be..."
If you're already worried about work/life balance after a year, then I suggets consulting is not for you. I sugest you get out and find something you enjoy doing straight away.
HOWEVER - don't think that you'll be able to give stages 1+2 above a body swerve - you'll still have to do it at your new place - its just that if you enjoy the work, you might find it a pleasure to prove to people how capable you are.