Stephen Donaldson once wrote, and I paraphrase, that "good fiction is a blend of the exotic and the mundane". This is never truer than in the creation of characters.

How many of your characters have personality traits of people you've met, people you like, people you dislike or even hate? Can you honestly say your character is pure creation, with no experiential input? I doubt it, and that's OK. A good character grows and evolves with the story, reacts in different ways to different scenarios, sometimes changes for the "better", sometimes for the "worse". In other words, a good character is predictably unpredictable under certain conditions. This makes for engaged writing and hopefully for engaged reading, too.

Sure, there are some character types that tend to be more "likeable" or more "popular" than others - the reliable, often stoic, "good" person; the likeable rogue, the truly evil protagonist, the Prince or Princess. Archetypes are easy. The real challenge is creating a character as complex and conflicted as all of us, yet still appealing to readers.