I'm also not generally a fan of emotional outpouring songs, but there are a few exceptions:

All About Eve - Martha's Harbour
Marillion - Kayleigh
Justin Hayward - Forever Autumn
Snowy White - Bird of Paradise

Songs that will cause me to withold the DJ's fee at a wedding (i.e. repulsively awful):

My Heart Will Go On
I Will always Love You (the Whitney version. I quite like the Dolly Parton original in fact).
Power Of Love - Jennifer Rush

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