Welcome again to Twentysomething, SFist's newest interviewing series. What exactly is Twentysomething, you ask? Well, similar to the Proust Questionnaire or the gobbledygook heard at the end of each Inside the Actor's Studio, we ask a bevy of famous subjects a series of searing questions, followed by a handful of tailor-made queries. (Hence TwentySOMETHING.) Today we ask Dan Johnson -- former SFist scribe and author of the excellent The Perplexing Problem of the Porcelain Bandits -- to drop and give us 20. Behold:

1. Introduce yourself in one sentence
I'm a story-obsessed stereotypical San Francisco- rides a bike, runs a food blog, has been known to cheer when the Tamale Lady walks through the door.

2. Zodiac sign
Libra

3. Hometown
Los Altos, but I get a little bit of cred for being born and going to elementary school in Oakland, right?

4. How many years in SF or Bay Area
Grew up here for eighteen years, was gone for ten, and have now been back for eight. So twenty-six all told.

5. Favorite SF neighborhood
Lower Haight, hands down. Cuco's, Rosamunde and the Toronado are my Holy Trinity of places. And we've got Haighteration. Best neighborhood blog = best neighborhood.

6. Berkeley or Oakland
Oakland. First - I was born at Merit Hospital. Second - tacos on International Boulevard. Third - the Trappist, Beer Revolution, and Van Cleef's.

7. Neighborhood you call home
Lower Haight.

8. How much do you pay in rent
Almost exactly one thousand dollars a month more than I paid at my first house in Cambridge, MA after college. That place had two refrigerators, five guys, and only one working shower. It was not a nice place.

9. What was your first job
I'm a Silicon Valley kid - I was a game tester and customer service guy for Epyx games in Redwood City. The game I tested was called Chip's Challenge - if you Google it, you'll get why bug-testing was far from glamorous.

10. Best sandwich
I'm going to go counter to type and not say a burrito, because a burrito is not a sandwich. So…the Renzo Special from Molinari in North Beach with extra pesto-garlic spread is the best meaty one. Avocado and pepperjack with extra jalepenos on Dutch Crunch at the Good Luck Cafe on Kearny is the best unsung veggie sandwich in the city.

10. Great Quake or Loma Prieta
Loma Prieta. I was a freshman in high school, and the quake hit during marching band practice. Our tuba players fell down.

12. Favorite MUNI line
The 22. Marina, Pac Heights, Western Addition, Lower Haight, mid-Market, Mission, Potrero, Dogpatch. Slow, irritating, but absolutely the best people-watching.

13. Favorite politician of past or present (you can only pick one)
Emperor Joshua Norton. I like him so much I'm getting married on the same day his first proclamation appeared in the papers here.

14. Best TV show of past or present (you can only pick one)
Party Down. RIP, Ron Donald.

15. Favorite bridge
Golden Gate. I once ran a Calistoga-to-Santa-Cruz relay leg that goes across it at two in the morning on a full moon. Unreal.

16. Best restaurant
This has gotta be a trick question. I mean, it changes all the time and there's no better way to get people to hate you than by not choosing their place o' the moment. So, um…Upscale: Nopa. Downscale: Lime Tree.

17. SF would be soooo much better if only ___________
I didn't have to budget an extra half hour for inexplicable delay when going anywhere on MUNI.

18. SF has the greatest _________

Urban running routes. After suffering through total mediocrity (flat, boring) in Chicago and New York, coming back here and cruising through Golden Gate Park and the Presidio remains a joy.

19. Redheads, y/n
Yes. My fiance is sometimes a redhead (it depends on the light), and she's smoking hot.

20. Question you'd ask if you were doing this interview:
Did you really have a housemate who disappeared completely while ostensibly visiting his parents in Scotland?

Thanks, Dan! And now a few tailor-made questions about you, if you don't mind.

- What made you decide, as a blogger, to write a book?

It wasn't really a conscious decision. I like to write stories, so I started this one with the intention of having it be a story. But, the thing kept wanting to be longer than a short story, so I kept writing it and turned it into a novel.

- What was the book's inspiration?

My roommate who disappeared completely. I was living in the Lower Haight with a Scottish master tenant who I'd found on Craigslist. He went home for the holidays in 2005 and never came back, leaving clothes, furniture, movies, a cell phone, business cards…basically everything one would have as part of a normal life. My other housemate and I tried everything we could to find him - even working through the British consulate to see if he'd turned up somewhere in Scotland. No dice. To this day, I have no idea what happened to him.

- Worrisome roommates are part of your story. Do you still live with roommates?

I live with my fiance now in a one-bedroom place. In some ways it's a step back - sharing a room is something I hadn't done since college. In other ways it's a step forward, 'cuz I can brush my teeth while she's in the shower.

- What is the best advice you can give a blogger (or anyone else) who wants to write a book?

Write a thousand words a day. Over three months, that's a novel.

- Anything else you want to let us know?

I'm obsessed with container ships. That might be my favorite thing to do in the city - go out to Land's End on a sunny day, watch the cargo ships come and go under the bridge, and wonder about what they're carrying and where they're coming from.

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You can purchase Johnson's wonderfully entertaining excellent The Perplexing Problem of the Porcelain Bandits on Amazon.