Its not seatbelts that bother me, it is having my eardrums battered by very loud announcements.
I agree, the automated announcments are far too loud, yet the live announcements from the flight deck are far too low.
Tinny music and endless attempts to flog lottery tickets or whatever.
I've never heared any music? - A few ads on the ground/boarding but thats it. The only thing they have ever offered to sell is scratch cards (doesn't everyone?) and tickets for the Stansted Express.
I've given up using Ryanair, they are not as cheap as they make out, and the scrum on boarding, incessant noise makes what should be fun (flying) a flipping nightmare!
They are cheap, if you stick to the regulations. If you don't want a scrum, pay £2 and get priority boarding.. It's worth it, just for the chance to jump in an emergency exit seat for all of £2!