It's as much fun as you want it to be. If you're willing to be chatty in the flight deck and go out for a beer, even when you're tired - Then you'll find the other pilots are fun too. If all you want to do is read a novel in the cruise and go to bed for as much sleep as possible, then you'll find the job is depressing.
Big points are:
Good:
Lots of variety on the B777 and getting even better.
Company treat you well because BALPA have negociated some good agreements for us.
Well paid by industry standard but always need to defend T's & C's.
Company doing well for the moment.
Looking forward to T5 and more B777's.
Not So Good:
Hard work but not as bad as RYR or EZY.
Long time to command.
Captains only have limited decision making, everything goes back through Ops or Cabin Crew Unions for maximum a*se-covering.
Rubbish pension.
I agree that if you're even asking yourself whether to come or not, this might not be for you.
LFW