It really depends on the deck you're using, but in RWS imagery, this Knight stands out because his horse is in full gallop, and his sword isn't held ceremonially like the other Swords court cards; instead, it's pointed forward, resembling a jousting pole, ready for forceful contact.
In my view, this Knight is aware of his intelligence (after all, he wields a Sword!) and carries a certain smugness about it. Due to his confidence in his intellectual prowess, he tends to act impulsively without thinking things through.
Consequently, he might adopt the conquering-hero-rescuing-damsels-in-distress persona, even if you're not in distress and actively prefer not to be rescued. He makes assumptions and acts on them without further consideration.
His impulsiveness often leads him to override the will of others. If you find charm in that, then he may come across as charming. Personally, I've grown tired of men trying to play the hero to impress, but not everyone feels the same way. Some people find it admirable. To each their own.