Number 2 is the only one that can write effectively on wood. I may not build a lot, but when I have tried to use a mechanical pencil for marking wood, it was a total fail.
I would suggest that the Dixon Ticonderoga is the most reliable, most cost-efficient, and easiest-to-use writing utinsil in the history of humanity.*
Each other option has more points of potential failure and additional complexities over the Ticonderoga. While more complicated tools may net you some improvement in writing style or sharpness, they are massive trade-offs in more basic areas.
This would be much the same question if it were "what car would you drive for the rest of your life" between fancy ones like Ferraris and Lambos to cheaper, more reliable ones like Corollas and Civics. Everyone likes the look of the Ferrari -- but the only car for the rest of your life? It's got to be reliable, or you're going nowhere. You want to be able to keep driving.
The Ticonderoga guarantees you can keep writing.
*intentionally overselling it for humor. But it is a nice, simple, good-quality pencil.
I got a Pentel with a tip like #3, so if #1 had the #3 tip I'd absolutely say #1.
My 0.7mm Pentel pencil has been the best pencil/mechanical pencil I have ever used, for the most part. It was definitely overpriced, like everything at a college bookstore, but it's been such an amazing pencil. Only problem is that I can't have it loose in the pockets of my spring jackets or it will try to poke through the cheap fabric.
Edit:
I have used 2, 5, and 7 (alongside ones of basically same design but different brand) as well, so I have no idea how good the others are.
I used number 5 throughout high school and university and they always served me well. Sometimes I thought about trying the fancier ones with gel grips, but old reliable BIC was always there for me. I trusted the BIC. In a world of uncertainty, the BIC will never let you down (or run around and desert you)
6, which I guess is pretty similar to my pick for number 5 on the pen post. Looks like the weight and style would feel best in my hand. Sadly none of them have my favorite feature of having fairly long and good quality erasers on it like my current favorite (non imported) mechanical pencil. Can't remember the name off the top of my head
As long as it Just Writes(TM) I don't care. I want to pick it up, and I want to write. I don't want to try writing only to find it's dried up and I have to scribble on some other bit of paper before it comes back to life. Now OK if I've left the lid off then that's my bad, but if I haven't then it should just flipping work.
Oh no... I'm that weirdo that likes the Papermate mechanicals.
They are just so simple and reliable. You could crush one and still get it to write again if you needed too and it had the eraser (that sucked) built right in that you never used but felt good looking at it and squeezing against your thumbnail when you were bored. Just had to put better quality lead in it.
But man Zebra makes the pens and pencil I would actually intend to use if I was planning it.
I had one similar to (not literally exactly) 6 back in high school, and some really dumb jock took it from me and I've wanted it back ever since.
The Bic one is okay, but pushing directly on the eraser to push the lead out isn't ideal. I always thought that was a design flaw. Having the button on the side of the pencil but away from the index finger is ideal honestly.
And even though we're not deciding based on lead size for this, I prefer the finer.5 to the more common .7.
Plus the top has a pretty large eraser that you can twist to expose more, so it had a mechanical refillable eraser too, which was pretty cool.
And I got mine in my favorite color, and that fucked just took it.
I was a super sheltered kid, coming fresh off being completely homeschooled (except for a Christian kindergarten), and that year of school was my first social contact with other people outside grocery stores and church. So I didn't do much about it, as I didn't have a clue about how anything in real life worked. I wouldn't figure a lot of it out for still another 16 years, but that's a different story.
Also at this point I haven't actually written anything at all with a pencil, pen, or marker for.... 15ish years now? Outside of signing my name anyway.
it rotates the graphite as you write so your lines are always sharp. it's an absolute game changer and now i can never go back to a standard mechanical pencil
Tossup between 2 and 5. Forever locked in competition with their strengths and weaknesses perfectly inverted to each other. I used to use 5 for lineart and then shade with 2.
My current pencils in use are a Pentel graph 1000 for pro in .3mm which is my top choice. Then I have a kokuyo enpitsu in .9mm which is very cheap and comfortable to use, and a Sheaffer twist mechanical pencil thing that is just really fun to use and has a nice heavy metal body.
I can't say I would choose any of the above pencils, I don't even see any lead holders (clutch pencils)!
i love my kuru toga, but i don't really write much anymore. i do still like doing sketches in my sketchbook, and i'm biased towards mechanical pencils, so it's a #1 for me.
Graphgear 1000, without a doubt. Such a great pencil, and I love that it is weighted. It feels so much more natural writing/drawing, at least to me, with the Graphgear.
If it's literally only one pencil for the rest of my life, probably the GraphGear 1000 since it would probably last the longest. If I can continue using multiple copies of the same kind of pencil, then it would be number 2 since that would be the most versatile and available one to use.