Of around 100 glider types flown (from Slingsby Grasshopper
Primary to EB28) the only 2 I would decline to fly again are
the Reinhard Cumulus (a sort of Grunau Baby with steel-tube
fuselage, and the Gull 1 that did the first soaring flight across
the English Channel.

Both had handling I would categorise as unpleasant.

Otherwise there is just as much fun to be had on a nice (or
challenging) day in a Ka6 as romping for 100k plus without
circling in a Nimbus 4.