Learning to fly in either a powered aircraft or a glider is equally exciting
and rewarding. Asking the question in a glider forum may yield a different
answer than in a powered aircraft forum. Skills learned in one can be used
in the other.

Learning to fly in a high density, tower controlled environment can be more
demanding than flying in the country, often with minimal radio.

There are other factors to consider, aside from which aircraft to use.
Glider instruction may be more distant than a powered aircraft, and may have
more limited operation hours. Also, in some areas, glider operations shuts
down in the winter. But, you can fly a powered heater all winter long.

Glider clubs can be more demanding. Often, you must spend time working at
the field. With a powered aircraft, however, you generally pay your money
and go flying.

If you have enough money, do both.

Even helicopters are fun to fly.

One problem with a power plane rating is that the glider club will try to
suck you into being a tow pilot.

Colin