I recently brought (well it only came the other day) Native Instruments FM8 soft synth, Edgar used several presets from this on Spring and Summer in Nagasaki (and why not! they are excellent and royalty free). If anyone wants me to list the tracks and which presets were used I will gladly.
A few presets from the Korg Wavestation were used on 'Rockoon' and other tracks.
Edgars favourite 'harpsichord' bass sound (used for chords on Nutshell awakening on 'Views from a red train' can be found in the form of the 'six string' preset on the FM7 and FM8 soft synths.
I have nothing against using presets myself in my music, I like to gather as many sounds as I can to make a good atmos...................Custom or preset!!