Do you like classical or jazz ensembles - they usually include a trumpet.
I love Jazz. The horns are so relaxing. 
The trumpet group contains instruments with the highest register in the brass family - perhaps that's why they are used in those type of ensembles.
That's interesting. I wonder how old is the Trumpet.
Historically they have been used as signaling devices in battle or hunting since 1500BC - only as instruments in the late 14th century.