Favorite strings for recording Acoustic?

I’ve been using Martin or D Addario Nickel Bronze strings. My acoustic was sounding overly bright and Nickel Bronze strings really changed the sound in a positive direction

Whatever strings the guitar was set up with!

Same! I used to love the Martin acoustic strings with the gold colored plain b and e strings . . . but they've changed them now.

They did. Check out the string section of their website.
www.martinguitar.com/strings/

For more brilliant, rich tones, Newtone Masterclass from the UK are the best I've found. The last much longer than the standard Martins and D'Addarios (which I like on the 2nd and 3rd day, but not outside that narrow window), though not as long as a coated string. I'll string them up just for recording.
The Santa Cruz low-tensions have a wonderful wound string because they behave more like classical strings. Less boom and more of a long-sustaining purr. They barely change in tone as well and last ridiculously long. The crazy price is actually offset by the lifespan. That's really important to me as I hate spending time changing strings. The SCGC helped me get off the Elixirs, which I had a love/hate relationship with.

String choices vary so much though. My Waterloo WL-S sounds amazing with the 4 year old strings it has on it now. Just the nature of that guitar. The dead strings let your fingers express so much through that instrument because then the sound isn't showered in overtones. I find my dreads are the opposite, they sound like big cardboard boxes when the strings dull. Trying different strings is a lot of fun (even though the changing them part isn't). I have shoeboxes full of various strings, some I haven't even tried yet.

Been using Ernie Ball nines and tens on electrics and recently went back to Elixir Phos Bronze 11 or 12s on acoustic...

There are way too many stupid change decisions made in the MI world. Why can't they leave well enough alone when they have a winning recipe?

I hate bright strings these days. They drive me nuts. They sound like brassy metal rather than bringing out the woodiness of the guitar. So I mostly just don't change strings (on acoustic) any more than I absolutely have to. Still, back over Christmas, I had to on both my McIlroy and Taylor. For the last few years, I'd been using Martin Phosphor/Bronze Med/Light (12.5s) and leaving them on for as long as possible. But it usually takes weeks if not months for them to age to where I really like them. So I wanted to try something that might sound "old" faster.

So now I'm trying out Martin Monels to see if they sound mellow-er enough. The jury is still very much out for me. I'm not sure I'm digging them. I thought I was at first, but now they're bugging me a little. I might just go back to the Martin P/Bs. But now it sounds like those have changed formula?? Dangit!

I've looked at others online, but haven't bought any others yet. Anybody know of any strings that sound "old" really fast?

Oh, and my J45 that used to belong to cowboycoalminer? It's a 2016, and he said he put Martin mediums on it when he got it new. And he never changed the strings ever. It's a little hard for me to believe b/c there are no rust spots or anything in the strings, but oh well. They sound PERFECT. I would love to open a set of new strings, put them on a guitar, and have them sound like THAT.