Apart from Coldplay a few times (all in sig) I've seen the following bands worth mentioning
Muse x 4 times (Wembley, Manchester arena and Etihad, O2 arena london) Seen Muse twice this year, definitely the 2nd best band in the world so so good live!
The prodigy x 6 (Creamfields,Doncaster Dome,Brixton Academy, Manchester victoria warehouse, Cardiff arena, Dublin arena)
Bon jovi x 5 (R.D.S dublin x 3, Maine Road manchester, Stoke stadium)
Robbie Williams x 3 (manchester arena x2, Phoenix park dublin)
Foo Fighters (Etihad Manchester)
U2 - Just the once at Wembley on the 360 tour!
Kasabian x 2 (Venue cymru llandudno, Birmingham arena)
Stereophonics (Venue Cymru)
There aren't many bands left i'd like to see, i would of loved to of seen linkin park, even had tickets for the last tour they did but it was cancelled because of the manchester bombings and then of course sadly chester passed away, Wouldn't mind seeing chemical brothers again, only ever seen them at festivals, gutted i missed them at manchester arena on friday
Also hoping Oasis do a re-union tour at some point!