First of all, why would you want to make your own wiki ? This may seem like a bad, or just not-so-good, idea when you say it, but let me explain why you should consider it.

Either you are into computer science or not, a wiki feels like the best place to have a documentation about your passions, job or any other topic that you could share to others, or that needs a strict configuration process. Even if you think that what you've done is only for yourself, other may be in a situation where they would have to, or like to, reproduce part of your work, and letting them know how to do so via a documentation written while you were fresh about a topic is way better than trying to remember each step correctly weeks, months or years after you've done them.

On top of that need for strict directives, documenting your journey, your difficulties and how you solved them is a good way to aknowledge what you've done, been through and accomplished, either you want to aknoledge others, or yourself.