Lots of stuff from the "classics" including Beethoven, Brahms, Verdi, Sibelius, Respighi, Berlioz, Britten, Vaughan Williams, Elgar, Rodrigo, etc, etc.
Then I suppose the early folk-rock such as Steeleye Span Fairport Convention, and later after coming to Scotland, Runrig.
And a whole raft of all sorts of Scottish, English and Irish traditional music.
Then there was the all the "Celtic Connections" stuff like Carlos Nunez and Susana Seivane.
If you ask me tomorrow, I'll probably give you another list too!