Someone is tired of being judged by his parents' reputations. The speaker says that whenever he cheats, jokes cruelly, or might someday commit a crime, people blame the way he was raised. Yet when they praise his accomplished father and helpful mother, he always seems to fall short beside them. Either way, he's measured against someone else.
The tone starts out frustrated and sarcastic, especially in the mocking questions about looking and sounding like his parents. Then it grows steadier and more defiant. The speaker admits his parents are a doctor and a lawyer, while all he wants is to play soccer. He answers the comparisons plainly: he isn't them, and he isn't their twin. The repeated "This is my..." lines at the end sound like a vow. The mood is a mix of hurt and determination, with a young person insisting on choosing his own path.