I was a big fan of Thomas back in the day.
It had a few points of decline, the CGI as mentioned and when the endless introduction of new characters first started.
I struggled at the concept of the first tv series looking different to the illustrated books, Ringo Starr no longer narrating, Harold, Terence, Toby, Trevor and Bertie being introduced - but there are a million and one characters in it now and the theme tune has changed!
RE: What's annoying you today? V2
'Illegitimis non carborundum'
Bar 36 and Beach in Sunderland used to be really bad for it going back some years. You'd actually feel the vibrations through you at some points!