Plus, in a power plane you
can repeat a figure over and over again without having to land and relaunch.

Not necessarily. If there is reliable lift around, you should be able
to repeat your figures all day long.

According to Les Horvath, if the lift is 4kts or less the figures can
come out as clean as one can finesse them, and without even worrying
about a vertical gust snapping your wings off while you are pulling
6+Gs or flying in the yellow arc, which can be a bit more of a concern
if the lift exceeds that by much. Glider acro rules!! (and is NOT
boring... whatsoever!) Now go get some acro training and start
pointing your wheel at the sky already

BTW, your 102 should be at least good for loops, stall turns/
hammerheads (commonly misnomenclature'd as wingovers [for those who
don't know, a wingover is on a 45deg up/down line where a hammer is on
a vertical...] ), spins, steep turns, lazy 8's, chandelles and the
occasional high speed pass.

-Paul (SZD-59 driver/roller coaster buff) Hanson

PS. acro is kind of a physical workout, so it is best not to do it all
day anyhow, although the smile may take much longer to go away...