I generally like this series because the main character is a good guy. The main issue I take with the premise is him being some sort of special animal lover and all the guild guys being obnoxiously heartless. It's super dumb considering dragons take the place of horses in this society and everyone who rides horses respects them, because they genuinely like animals and the animals can weigh a ton and will let you know if they're unhappy.
Think about it. They're knights who have to rely on and trust dragons. A better premise would've been he's a newbie with his special dragon speech ability and nobody will give him a shot. Something like "I'm the only one who can talk to dragons" would be better than "got kicked out of the dragon guild for respecting dragons too much." Putting the guild aside, it's a good series.
If this series turns into furry dragon harem I'm giving it a 1/10. No mercy.