These festivals are what you make of it.
Line up wise all the big established dance festivals in the UK (Creamfields, Global etc) have to cater for a wide range of tastes musically so they get the numbers through the door.
Sure, there will be people at Creamfields (and other festivals) that i would not overly want to spend time with. And there will be DJ's that i would rather cut my ears off than listen to, but equally there will be people there that i love to spend time with and DJ's that i would love to hear.
Every year people criticise the line ups at these big festivals, but every year they do well and every year there is something for everyone. Which is the aim.
I went to Creamfields last year after not going for maybe 4 or 5 years and really enjoyed it. Of course, not all the music was up my street and not all the people there were my kind of people but some of the dj sets we saw were great.
Take these festivals for what they are - a good day out with your mates in (hopefully) the sun!