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Don't wait for me!
It really is a horses for courses situation.
I've had this discussion many times with my mates who absolutely love Glasto. When I went with them I enjoyed it but for me the enjoyment Vs time, effort and money ratio just wasn't enough. You mentioned the dance acts which is more my thing anyway, but for the same amount of money I could've going to Ibiza or ADE and had all the creature comforts that you lose at Glaso - bed, shower, sanitation and the biggest thing for me not having to walk 40 minutes through treacle every time you want to see someone at a different venue.
If you want to go to the south east corner you have to miss the last hour of the headliners to be sure of getting in - I watched Chemical Brother on The other stage (which was brilliant) and wanted to carry on so walked 40 minutes through treacle only to find that area was 1 in 1 out already. Another 30 minute walk back to my tent, brilliant!
I do understand why people love it and I think it's probably something that gets better the more times you go as you know what to expect and become more experienced getting there and navigating the site, with hindsight if I did it again I'd do it completely differently. The only way I'd go back is if I did the expensive version and stayed in a teepee so at least you can just turn up on the Friday without having to worry about pitching you tent in 6 inches of mud!
I see you're comparing Ibiza (favourably) to Glastonbury. Now I haven't been to Glastonbury since the mid 90's but I think I can safely say they're not really for the same audience . . . .