But what if one of these sidequests has a good reward?
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When making ttrpg characters to play, it's very easy to just make your character "you" if you don't think about it or plan anything - you'll naturally revert to how you approach situations without conscious effort - however that means after a while your characters all start to feel the same.
If you want something that feels unique or different to your previous characters, the easiest way is to take some aspect of your personality and greatly over-exaggerate it, and build the character around that - This way you're still using some of your natural reactions and inclinations, so it's much easier of a role to inhabit than someone who's wholly different to you.