It really tires me how some fans try to make Aegon look like an asshole who doesn't give a shit about anything. This is a fundamental misunderstanding of his character as such. Of course he cares, that's literally the essence of his personality. He cares. He and Aemond both feel too much emotion, but if Aemond sublimates into self–improvement, trying to be strong, cold and detached, then Aegon is literally an open wound. I want to talk about this, also using Tom's interviews (yes, I think the actor's opinion is valid in this matter) and the few scenes that we have in the first season.
We know that Aegon didn't want the throne and wasn't ready to rule. The scene with Alicent, who explains to him the prospects for the future of their family, seems very traumatic to me. Imagine what it's like to know from your childhood that the lives of people close to you depend on you, on how strong you'll be. Such a burden can destroy anyone. You can't just ignore it.
Next, we're shown how Aegon drinks on Driftmark. And that's a pretty sad sight - several cups in a row, wincing, as if taking a medicine that will help him to feel better.
Actually, I like the theory that he gets drunk after Aemond says that Helaena is his future queen. Another reminder that he'll have to marry his own sister, for whom he has no feelings. And he drinks because he tries to numb his pain.
The same goes for his obviously unhealthy attitude towards sex - he uses it to numb his loneliness. I believe that Aegon literally didn't have the opportunity to feel what love is in any form. His father disliked him and showed it openly. His mother loved him, but she never knew how to express it the way he needed to. He was married to his sister (the tragedy for both of them) and it was a matter of duty, not feelings. At the time of the first season, Aegon is deeply unhappy and this is obvious. I have every reason to believe that his need for physical intimacy is based on the fact that this is the only form of love he can receive. Considering that Aegon is quite smart, I even think that he himself understands how ugly this form is, but there's nothing he can do. During the act, I guess in some unhealthy way it really saves him from loneliness, longing and the need to be loved, but in the end it makes him even more unhappy.
Then it's impossible not to remember the eighth episode and the famous:
It's still clear that family is important to him. Yes, he feels like a stranger among his relatives, but it hurts him just because he cares. He cries and says "it will never be enough for you or father" because he wants it to be enough. He still loves them and wants them to love him back.
"What Aegon wants more than anything is to be told by his dad ‘I have faith in your capabilities as a young man. I see you bringing prosperity to King’s Landing.’ But he hasn’t said any of those things. His dad has completely ignored him, in fact, throughout his entire youth." (с) Tom Glynn-Carney for Esquire
Next, we can move on to episode nine and the fact that Aegon ran away. I've seen a lot of opinions that this is an indicator of selfishness and like...what? He was scared. This follows from the script:
He was scared, he'd never leave his family, much less Sunfyre. It was a decision made in a panic when he realized that his father had died and the moment he had feared all his life had come - he needed to accept the crown to protect his family.
During the conversation in the carriage, we see that Aegon was really hurt that his father didn't love him:
He even said "because he didn't like me" when talking about his father's attitude towards him. He didn't use the word "love" because it was obvious to him that his father didn't love him. He used the word "like", unknowingly emphasizing that he couldn't count on even simple sympathy.
He's also well aware that Viserys could have named him the heir, but didn't do so simply because he didn't want to and because of this, he - the eldest son, feels unworthy of the throne, and also completely lost.
When Alicent tells him that Viserys wanted to make him the heir before his death, an emotional dam breaks inside him, it's literally written in the script:
And at this moment, looking at the dagger, he's not even listening to Alicent, he's completely in his thoughts - maybe, at least for a second, his father cared about him. And when he asks his mother if she loves him, we see how much he craves love, how broken he really is, how important his family is to him.
I know this post is insanely long and I haven't even analyzed the various microexpressions in Tom's acting, but I'm really tired of people wanting to make Aegon something pure evil.
"I also see Aegon as being incredibly complex. He's not an out-and-out psychopath. I see a multilayered character that just has endless potential of pits of vulnerability and empathy and things that we don't see. I think it's his vulnerability that breeds the darkness. It's the way he copes, it's his security, it's his safety blanket, it's an addictive coping mechanism for him to shut things out and to be cold." (с) Tom Glynn-Carney for Entertainment Weekly