I wasn't the easiest guy to live with. I had multiple personalities, but what bothered her was that none of them made any money.

The line is built as a self-deprecating comic confession: the speaker admits to being difficult at home, then heightens the complaint with an absurd twist—“multiple personalities”—before landing on the pragmatic punchline that none of those selves are financially successful. It plays on the gap between dramatic personal turmoil and everyday domestic pressures, suggesting that eccentricity or instability might be tolerated if it came with material security. The joke also satirizes a culture that measures worth (and even relationships’ endurance) by earning power, turning psychological complexity into a mock “portfolio” that fails to pay dividends.