I really think there is a misconception that gelding equals a dead head horse. That they are for those with little experience or are new to horses. This seems to put a stigma on people who do not want it to appear they are not good enough to handle a stallion.
You beat me to it, Bingo.
Some people act as if geldings are horses with training wheels.
The reason for loving geldings is not an inability to handle a boisterous horse -- it's because however lively the horse may be, his energies are FOCUSED on you and the job at hand.
For example: My soon-to-be-gelded stallion, Flash, is as sweet and gentle as they come. Even with a filly in heat nearby, he is well-behaved and respectful. BUT, as lovable and pliable as he is, his mind is still not 100% on me; his behavior may be perfect, but he is still thinking about that filly next door. He has other agendas. (But wait until he is gelded -- he will redefine the term puppydog.)
Mingus, on the other hand, is a gelding with enough fire and spark for 3 or 4 stallions. He has ATTITUDE and can be a handful for anyone, but sharp as his mind may be, I know it is always on the job at hand. He may look me in the eye and ask "why?," but put him in harness and he is the perfectly-behaved driving horse all the way. He is not a horse for newbies or most youth, but ask him to turn it on at halter, and there's no hand foot-setting or backing -- he does it all on his own.
I love both of these boys with all of my heart for reasons that have nothing to do with what they have or have not.
Three other well-known forum geldings have more attitude and high spirits than most stallions -- Nootka's Mouse and Pyro and Leia's Kody. Not one is in any way a deadhead and none are horses for beginners. Each has a mind working overtime, with personality by the ton.
I am a huge gelding advocate, but I want to promote them for the right reasons. Some are gentle and kidsafe, but so are some stallions, some are perpetual challenges for their handlers, but whatever their personalities, they benefit from the removal of one overwhelming distraction. Their mind is on the job -- especially when that job is being with YOU.