I disbud too. Most people with dairy goats do. I premedicate the kids with banamine at least 30 minutes before doing it, and it is over in seconds. I know it hurts, it is a hot iron (which I managed to burn myself with once, derp), but it is fast. And you're right, they're back to being playful, bouncy kids as soon as they are set down. They also scream a lot from just getting forcibly held, let alone getting disbudded.
I am against horns after I nearly lost an eye to a horn. A horned goat threw his head backwards and nailed me hard on the cheek. Left a lovely shiner. An inch higher, and I'd get to wear an eyepatch like a pirate. The kicker, he did it by accident. If it hurt that bad from an accident, I'd hate to think the damage he'd have done if he got aggressive. BTW, that goat is in freezer camp, as he was being raised for that purpose.
FYI, that same horned goat also killed another goat with his horns. He hooked a horn around her collar (lesson learned, collars as bad unless they are breakaway) and throttled her. It happened in the time it took me to go get some treats from the house for them, since I'd been out there with the goats, and left to slice some apples for the group. I came back, she was dead. He did manage to rip the collar free, and it was still in his horns. Having to tell her breeder what happened was the worst.
Yeah, telling breeders about the bad things that did in their animals is never fun. I've certainly had my fair share of that. :/