I can't truly assimiliate because I dislike most cisgender people
Cisgenders gave me body dysmorphia as a kid that I still struggle with today. They say horribly transphobic things everywhere I go. I see cisgenders and normal people as equals (physically, spiritually, etc.) in reality but there is a socially-enforced difference that will make me always see people who haven't transitioned as inferior in a way, because they ruined my life in a lot of ways and many actively try to make my life harder. I think I would have far less empathy than I do now if I weren't born transsexual, which also makes me grateful for my experiences in a way. Especially now that I don't have dysphoria it's easy for me to look back on my life and be glad I can use my past to be more understanding of people different from me.
There are a lot of cisgender people that are nice. I tell dates that I transitioned because I don't want a partner to be transphobic, and all of them have been very accepting. They are sometimes nicer than how the average trans man acts towards me lol. But I still don't trust them by default and never will, so I will never be able to mentally blend in and see myself as a regular member of society. Am I a normal person physically and socially? Yeah. But I am not a cisgender and wouldn't want to be one at this point in my life.