I am the poster boy for laziness. When I buy a bass, if the strings are in good shape, they stay on. I don't even think about changing them until I need to.
For flats, when I picked up my vintage Ps years ago from Bass NW (RIP) they recommended Ernie Ball flats, so that's what I got. One has mediums which have darkened into the classic thump of ancient flats, but the other has lights (because they were out of mediums) and they still twang.
That convinced me something as simple as changing gauges can make a huge difference. But that doesn't make me want to start experimenting! For one thing, if you own more than one or two basses you need to try different sets on each bass because what works on one may sound like poop on another. The other issue of course being coughing up $30 or so for every new set you try, some of which you are really going to hate.
For rounds, I buy GHS Boomers because they are found everywhere cheap and they sound good to me.
DB strings are damn expensive...steel strings start at just over $100 a set these days, nylon (synthetic gut) about the same and real gut strings start at about $300 a set (why I use nylon

)...so I slap on a set and they stay there until they unravel. I had one brand which I loved, they were $250 a set but sounded
so sweet...but they kept breaking on me, once when I was putting on a new set the E string broke! So I changed brands and took a slight hit in tone to gain longevity...plus changing a string on a DB at a gig is like water torture.