Since this isn't posted in an RF sub-forum, I would say I have no preference other than what I decide will give me the best photo at the time. That said:
I took a ton of photos with a 50mm f/1.7 Yashinon lens and was happy. That was before I learned that there was a reason for interchangeable lenses. 😛
So I bought an 18mm Spiratone (remember them?) f/3.5 lens and got a lot of shots I really liked, and couldn't have gotten with any other focal length. Spiratone had a 35mm lens to give away for a certain amount spent on the order, and I got it. Sun lens as I recall. I have never been able to like 35mm. I have some good 35mm lenses that sit on the shelf and cry with each other. It isn't the quality of the lens, just that focal length. But the 18mm? I am still in love with it.
You went with Spiratone, and I went to Hanimex. In 1974 when I decided to give myself a 'sabbatical' around the Pacific islands and in Southeast Asia, I went shopping (this in Toronto and I was saving like mad for my first lifetime's dream journey on what was a 'medium' salary in Canada, so no great money to spend on luxurious camera gear) and bought, first, a Mamiya 500 DTL with what was then a top-of-the-line 50/1.7 Mamiya-Sekor lens. Also three Hanimex lenses, a '28, a '35 and a '135. Plus a lot of Kodachrome 64 and 25 which I picked up over a six months period in old film bins at various camera shops and supermarkets (yes, they sold films in food shops in those days) around the city.
In mid-'74, suitably overloaded with all this gear, I bought a multi-stop one way ticket to Australia and flew first to Hawaii, where I fell in love with Honolulu and seriously considered staying on there, then Western Samoa, American Samoa, Fiji, Vanuatu (New Hebrides) and Tahiti. By the time I arrived in Apia (Samoa), a few disasters struck. First the '135 Hanimex jammed up on me, nobody local could repair it and when I had the opportunity to send it back to Canada with someone who was flying there, I let it go. (It never made it, but that's another story.)
In Fiji the '35 was stolen from my hotel room. Which left me with the '50 and the '28, a lens I liked even if all the edges on my images were unsharp unless I used it at f/11. At that time '28 was a focal length I had never really taken to. During the next eight months (including a four months stint in Sydney where I did casual work and replenished my sadly depleted finances), I did 99.something % of all my images with the nifty fifty. Before I left for Asia a few months later a friend arrived with my Rolleiflex TLR, which expanded my photo making a fair bit. And I found out the '135 Hanimex was MIA. which annoyed me, but in retrospect, I forgot about it very quickly.
That journey taught me many valuable lessons. Notably that when we are limited with the lenses we have, we make do, as we have to.
Ultimately I sent off a few hundred slides to a photo agency in Toronto, and began selling stock.One image, a B&W of a Hindu temple in Bali at sunrise with a flock of monkeys swinging on vines in the foreground, sold 16 times in the next few years, including for a two page color spread in a German magazine (they put in a color tint to simulate a sunset). Considering that now, half a century later, it's all but impossible to even give away images taken in Bali, that was a marvelous time to be out and about with a camera and just photographing as I went along - even with a Mamiya 500 DTL.
On a closely related topic (actually, responding to a post in this thread), two long ago memories for me.
45mm on many 1950s 35mm P&S cameras. Mostly German made, so top build and optics. Many had Schneider or Rodenstock lenses and made top quality negatives. Now and then I print some in my home darkroom, and I always marvel at the quality. Of course films then were so much better, much more silver content.
Then 75mm on many 1950s 120 (6x6 and 6x9) folders. The Planar on my Rolleiflex 3.5 E2, even with a large egg-shaped bubble in it from separation, still produces outstanding images.
Amazing what the photographers of that time could do with what we now consider to be almost basic (if not outright primitive) cameras.