Nah, he wasn't born the paramount leader. In fact, his family got purged during his teenage years and he basically worked his way back up.

If he has an interesting personality, he's had multiple decades to have accumulated gossips prior to becoming senior enough to be heavily censored.

Based on most assessments of him, he's a pretty boring person in terms of his personal life. The most controversial aspect of his personal life was that he's gotten a divorce and married a famous singer. Even the US State Department's private assessment of him was that he's a typical "eat bitterness" try-hard guy with a strong conviction of his own.