This is a very "odd" poll question, in that "trained" means something different to different people...I'm with Bill in that I don't at all believe that the more "obedient" a pet is the stronger their bond with you is; if that were true then most of us here would not be very bonded to any of our birds!!!
Training your bird to do "tricks" is great if that's your thing, although I don't at all like some of the methods people commonly use to train their birds to do "tricks", namely food-deprivation and actually making their daily food (meaning their meals) dependent on how "obedient" they are and how well they are "performing" and "doing what they are told"...I know a few people who are excellent "parrot-trick-trainers" and have parrots that do quite an array of amazing "tricks", and who have made very successful careers from their very "well-trained" parrots, which is impressive when you watch their birds, until you learn HOW they went about and still go about "training" them to do pretty much whatever they tell them to do. So that's not my gig at all...
And as far as "stepping-up" goes, maybe I'm alone in this because all 4 of my larger birds were hand-raised/hand-fed and my 8 Budgies were hand-raised/hand-fed by me, but they ALL stepped-up for me immediately without any issues from the first day I met them, while still at their breeder's home, and I guess that's just something that baby birds who are hand-raised just learn? I'm actually asking that question because I don't know the answer...I didn't "train" my 8 Budgies that I hand-raised/hand-fed myself to "step-up", I just put my finger down in front of their bellies for them to "step-up" on, starting when they were around, I don't know, 4-5 weeks old...And they just did it. And I'm assuming the same went for my 4 larger birds that were hand-raised by other breeders, I don't think they were "trained" to do that, I think they just do it naturally if they start doing at such a young age...So no "training" there....
My birds fly to me when I call them, and I have a unique "contact call" with each of my birds, but that wasn't "trained" either; each bird started saying something or making a noise/sound/whistle that was unique when they were young, and I just answered them back making the same, unique words or sounds...And those became their "Contact Calls", and when I wanted them to fly to me I would make their individual Contact-Call and then say "Bowie, come here!", or "Kane, come to mama!" after the Contact-Call, and they just came, lol...As Noodles already said, I too suck at formal training....BUT, I simply listen to my birds. I get to know each of them well, I bond with them, and then as Bill said, I earn their trust and they earn mine, and from that comes a mutual understanding of each other, and from that comes them doing things that I ask them to do. I have NEVER actually sat and had a "training session" with any of my own birds, not ever...I have hand-tamed many a parent-raised Budgie or Cockatiel, but that's not really training them, that too is simply listening to them, getting to know them, letting them get to know me, earn their trust, they earn my trust, and eventually they are "tame" and will "step-up", not because I trained them to step-up, but because I have earned their trust and they in-turn will do what I ask of them, and because we come to understand each other, they know what I am asking them to do.
I think it's great if you use "trick training" as a way to spend time with your birds and bond with them. That's a very positive way to become closer and closer to them, and to earn their trust. So props to those that use "training" time as a way to become closer to their birds...I just don't like those who only care about achieving a certain end-result from their birds, and in order to achieve that end-result they use not only negative-reinforcement but also some methods that are anything from questionable to downright cruel and abusive.