Its demanding but in some ways also forgiving. In terms of tone and dynamics you probably never have to struggle to be heard and just about about any note sounds good, compared to a sax, guitar, or piano which don't have all that great of tone though just about anyone can sit down and play some notes. Personally I consider most the sounds that a trumpet makes as alright, you won't ever make someone shiver like finger nails on chalk boards, and there are some tones or intervals in saxs, guitars, pianos, violins that will definitely make you shiver. Part of the demanding aspects are that the expectations are a little higher, most people expect a lead player that can improvise over any form at any tempo and knows dozens of songs or can sight read anything that is thrown at them, however this not necessarily a bad thing. If you have ever played drums, the limitation to play recognizable songs is definitely difficult, though there isn't way to over come that expectation, except maybe move to Brazil.