Tai is the art of physical combat
apparently "hand to hand combat" and unlike
any other, Taijutsu requires a high level of
skill and creativity.
A simple Taijutsu move when used
creatively can be very useful and deadly and with good freeform, a simple taijutsu move
can be achieved in many ways. Freeform
plays a very strong role in taijutsu, when you
are good with freeform then your Taijutsu
would be standard.
Taijutsu basically makes you keep your chakra reserve as it requires just the
physical energy to execute. But some do
allows you to enhance them with chakra even
elemental chakra.
Types.
Normal Taijutsu or non-chakra enhanced
ones which can be a basic punch/kick, a throw,
a block, flip, slap, poke, intercept, roll without
the need of chakra, etc.
Chakra enhanced Taijutsus which most can be either coating the fist or foot with chakra to augment the damage it causes eg, Tsunade's Chakra enhanced strength.
Special Taijutsu: this are taijutsu from clans
like the Hyuga's Gentle Fist, Kaguya bones
or can be Taijutsu that are near ninjutsu like the EIG.
Nice one on the importance and danger but the very basic one is you are prone to ninjutsu like Nagashi and bodyy surges though this should not discourage you from using tai.
Any questions?