Bokeh is a designed amalgam of uncorrected abberations. Creating a lens with good bokeh is an art.
Since 1969 I've mostly shot with Leica lenses not particularly known for being super sharp. I, seriously, never knew what bad bokeh was until I bought a Nikon in the mid '90s.
My favorite "good bokeh" lenses and the year I bought them, since I don't know which version they were:
35mm Summicron M (1972)
50mm Noctilux M (1975)
50mm Summilux M (2001) (Superb at f1.4)
90mm Summicron R (1970) (my all time favorite portrait lens)
140mm f2.8 Contax for 645 format (1999)
300mm f5.6 Apo-Symmar which I use with 5x7 film, very good out of focus areas at f8, used for portraits.
If you use lenses with good bokeh, you'll never notice. If you use lenses with bad bokeh, you will.