@AsuraHe's a couragous, ballsy, and definitely, a really sort of heroic character, he does represent a moral good, but he has his cracks, and I love playing with that. Some cynicism, some issues in sometimes understanding the true concequences of some very, very big actions. I have played with killing him in true George RR Martin fashion, but he isn't stupid, and hasn't fucked up. Yet. He definitely rolls in his own Kingdom with a lot of authority and respect, but he is still young, and has to learn, as well as experience. He is Lord Hand (and technically, still is), and some of his things have come by luck, though he is no Jon Snow- he knows what to do, and his sister, ever the budding Tyrell female, knows how to steer him to do the right thing, while she pulls strings. Get rid of Alerie, and Garland would do a good effort for a while, but would lack the contacts to really play the game to it's fullest. I love him for that, he really does represent a side of doing the right thing, and has made mistakes, not being afraid to say it, not being afraid to know he is flawed and problematic, though he enjoys pleasures, alongside the many talents he has- falconry, tourneys, feasts, women (not to mention a Yunkish whale, which was an impressively drunken one-night-stand come diplomacy), and politics, as well as running Kingdoms. He's a mixed bag really, and if a brown-curly haired, brown eyed young Lord doesn't make his mark, you're probably Northern. Which I'd imagine they would say, "This is the literal reason we dislike Southerners." :D
But I do love it. At the start, he was rather merciful, rather chivalric and honourable to others. The world he's in has changed so much, he has had to get with it, and even he's become hardened by the events that happened...being almost killed and stabbed in the fucking armpit at the Battle of the Kingswood saying it all, really. He is afraid of Baela, which is why he loves her so much, though he shows remarkable courage even when he was close to dying/getting killed. He is pretty driven, and he is mostly driven by family, to always sustain the Tyrell name in a position of power, as well as do the right thing, rather than be power-hungry and obsessed to go one step beyond and take the fucking Throne for themselves. They're smarter than that.