I've never been able to write one. I get bogged down in details, and then I leave important things out, or go on too long about things that aren't important, and eventually give up in frustration. I can only write bits at a time. Even if I wanted to, I'd only be able to write a little bit of it. (I used to try. Now I'm not all that interested in doing so.) So part of my style of talking about my life is because of that.
And part of it really is that if you want to get to know me I'd rather you do it gradually. I do things in public, but I have an intense need for privacy even about things that most people would find silly to be private about (and almost no need for privacy around some things that nearly everyone is private about, so there's little rhyme or reason to it). It's not comfortable, but this is how I do it. I know another autistic person who handles the same thing by simply refusing to talk about herself except when relevant to the issues at hand. I don't take it to that extreme but I understand why she does it that way. It's balancing public and private, as an introvert, when what you are doing is very public. And it's tricky. And yes there are some things I have reasons for not talking about -- not for evasiveness sake, just that there are reasons talking about them would not be a good idea (and I don't always want to go into those reasons to strangers, either). And some things I'm just plain self-conscious about -- I hide that well, but it's there. (And when I know that a lot of people are reading or watching me, then I can become self-conscious about nearly everything to a ridiculous degree so that even things I'd normally discuss become impossible.)
The problem is that then since I only write in pieces I have to deal with people's assumptions about those pieces. When I write about having been in gifted programs, people assume an aspie stereotype. When I write about a lot of my current life, people assume a LFA stereotype. (This is one reason I detest the stereotypes, because bits of me at various points in time fit bits of them but all of me has never fit even one of them.) Then when they find out I don't fit the stereotype, they often get angry at me rather than getting angry at the stereotype. But if I were to give every detail in expectation of that ("I can't do this now, but I used to, but when I used to do it it wasn't exactly the normal way either, and then before that I had this and that fluctuation", etc) then I'd never write anything because I'd be too focused on covering every contingency for what someone might think (and every detail of my skills, which are not straightforward in how they've been obtained and/or lost for the most part).
So I do it this way, which is imperfect, but it's how I can do it, within the constraints of both what I want to accomplish, what my comfort level is, and other considerations. If you want to talk to me privately at some point about anything I'd be glad to do so.