Surprised to see people saying 9th as that is where my Saturn is and I find it hard (it is opposite my 3rd house Moon, though).
Given a choice, I really don't know where I'd have it. Maybe trining my Moon, but that would place it in either the 7th or 11th.
I guess maybe my 1st, as my ruling planet, I think it would change others' perception of me, taking me more seriously.
@plutolover my Dad has it in his first and people always ask him for directions and assume he is in charge.
@tbb Interesting. I'm Cap rising and living in a touristy area, people often ask me for directions. Weirdly, I'm only about 50% right on where I direct them, and I know this area like the back of my hand 🤔
When Saturn was transiting my 10th house it was the best period career-wise, I got a better job and my work was acknowledged and rewarded by superiors so I would choose that house over others. But it was also in Libra which might be a bigger factor. I would not mind 3rd or 11th House Saturn as long as it is in Venusian or Mercury ruled sign. I would rather pass on Saturn in Sun, Moon and Mars ruled signs, no matter the House.
Mine is in the 10th with whole signs, 9th in equal houses. I'm happy with it there, to be honest.
I've been interpreting my chart with whole signs for awhile and it's clear to me that people do take me seriously. When Uranus opposed my natal Saturn a few years ago, I had a public "canceling" and while it wasn't fun at the time, it also told me that people saw me as an authority figure which I am just fine with. I'd rather be respected than ignored.
I have it in the 9th. Issues with teachers and bosses!! And God!! Interrupted higher education, issues with foreign travel. Those of you who would like Saturn in the 9th, I’d be interested in what you would expect the good parts to be. 🤔
@aspire for me, it’s that the effects of Saturn in the 9th seem more bearable than when it’s in other houses, not that Saturn is ever easy.
Maslow’s hierarchy of needs comes to mind, and many of the other houses, besides the 9th, seem to represent basic needs. Health, shelter, relationships, etc.
Saturn in the natural Sagittarius house give you a Saturn/Jupiter signature. With this signature Saturn tempers Jupiter impulsivity and Jupiter lightens Saturns dour nature. I have it in another combo (Cap stellium and Sag Moon/Asc).
Mine's in 10th in Cancer. I think it pays off once you're about 80 years old. Most of your life the external world presents relentless obstacles and makes you feel high anxiety. It's hard to own property or succeed at things that Capricorns love to do, like status, career, public recognition, hierarchical ascendency. None of that works, it's like you are barred from creating an identity based on the external in terms of manifest things. In my experience I've had to cultivate "being" rather than "doing" and from that basis opportunities arise, but it's the opposite of how society works, what is valued, so it's been a lonely and confusing path. Where a planet is placed is very much about the opposing house too, so that's worth bearing in mind.
I wouldn't swap it for another house because I would undo all the psychic work I've put in having it in the 10th, and that's worth a lot where Saturn is concerned.
Natally I have it in the 12th in Scorpio, but if I had to choose another house, it would be the 11th. I felt the best with having transit Saturn through my 11th, and it was the best time in my life in every aspect. It was also good when it was transiting my 1st house. Having Saturn in the 12th house natally, it's like someone is holding you for the top of your collar and pulling you back, and you want to run, but can't, like in cartoons. 
@dori that is a good description. I often have dreams that I am trying to run but can't gain traction and often end up floating in slow motion. I am grateful though that it has forced me to examine my actions and motivations (conjunct mars) so deeply, it is preparing me to live a better life. Or at least that seems to be the goal.