Oh, this is a pretty cool idea for a thread. For those of you on here who don't know, I tend to follow romcom/SOL/romance type series, but if there's something about them that truly catches my interests, I do read outside of those genres.
Weekly Shonen Jump: Act-Age, WNL, and Yuuna are my top 3 follows that I actively read weekly. I also half-heartedly follow Dr. Stone, Chainsawman, Saiyuki, and Yui Kamio (although those last 2 probably won't be a thing for much longer).
Weekly Shonen Magazine: Honestly, it'd probably be easier to list the things I don't follow lol. I
don't follow any of the sport series (Ahiru, Days, Daiya, Blue Lock), Nanatsu, and Fire Force. WSM without a doubt has my favorite lineup of all of the weekly magazines. Gotoubun, Kishuku and Senryuu Girl would be my top 3 of the current lineup. Still hoping Mako-san will get translated one day, although the translator would probably have to be pretty confident considering the chapters are pretty text-heavy.
Weekly Shonen Sunday: This one's a bit of a mixed bag. My avid follows are Amano Megumi, Komi-san, Tonikaku Cawaii, Sheriff Evans, Maoujou, Maiko, and Ponkotsu. I also keep decent tabs on Switch, Ariadne, Undine, Kimi, Yukosae, and Gofun. Although I follow a pretty good number, it's pretty sad to see the state of the sales of most of these series. I feel like most definitely deserve to be selling at least a bit higher than what they currently are.
Weekly Shonen Champion: Rokudou no Onna-Tachi, Beastars, and Iruma are without a doubt my top 3 and are some of my favorite currently-running series overall. I also like Atsumare and Ashigei quite a bit too.
Weekly Young Jump: Kaguya-sama and its spinoff series are really my only avid follows here. I also read Shadows House and Momo a bit and they're ok, and I read the untranslated chapters of Maid to Hikkomuse since I'll follow SankakuHead to the ends of the Earth thanks to Umaru lol.
Weekly Young Magazine: Its thread doesn't get discussed on here too much, but there are actually a few pretty nice things running right now. I really find Nande koko ni sensei ga!? to be pretty funny with the sheer absurdity of the series, same with Hen na Chishiki ni Kuwashii Kanojo: Takayukashiki Souko-san. Besides that, Parallel Paradise actually having an interesting plot was the biggest shocker for me when I first started it. Tejina Senpai and Sounan desu ka? are both pretty good and have pretty nice anime adaptation out right now. Gyaru to Kyouryuu is a gem and I hope the translations start up again. Hantsu x Trash I've also slowly been reading up on.
Bessatsu Shonen Magazine: Tenju no Kuni, Flying Witch, Shouraiteki ni Shinde kure, Araburu Kisetsu no Otomedomo yo, Jun to Kaoru, and Sekai ka Kanojo ka Erabenai. The first 4 are my active follows, and the latter 2 are passable.
Jump SQ: Kono Oto Tomare! is my main read from this magazine. Thank goodness for the anime since I would've never tried the manga without it, and the manga is much better than the anime. I'll also occasionally look at Dokyuu ****** H×Eros and Dark Gathering (mostly just to figure out what this one's about haha).
Gessan: Takagi-san, Misoshiru de Kanpai, and Sensei wa Koi wo Oshierarenai are my avid follows. I know most people know Takagi already, but everyone who knows that should also be aware of Misoshiru. It's just so sweet! I also read Takagi-san other works author's, Koi ni Koisuru Yukari-chan and Kunoichi Tsubaki no Mune no Uchi, along with Asoko de Hataraku Musubu-san as well.
Ultra Jump: Usagi-moku Shachiku-ka: the lonely only lol
Ura Sunday: The big 4 here are Jyaken San Wa Sugu Bureru, Ao no Orchestra, Danberu Nan Kiro Moteru? (Doga Kobo anime hype!), and Himitsu no Reptiles, with Yuusha-sama, Yukagen wa Ikaga desu ka? being something I occasionally catch up on.
Jump +: I used to follow a lot more on here, but with the axing of things like Saguri-chan and High Risk Mission Therapy, that amount is dwindling. I have been loving Spy x Family, Tokedase! Mizore-chan, Aharen-san wa Hakarenai, Shouwa Otome Otogibanashi, Slime Life, and Ao no Flag.
Magazine Pocket: Much like the other mediums (weekly and monthly magazines), I think I'm following the most from Kodansha's online platform as well. A lot of cute romances here; Fechippuru ~Our Innocent Love~, Ojousama no Shimobe, Ijiranaide, Nagatoro-san, Ponkotsu Fuukiin to Skaato take ga Futekisetsu na JK no Hanashi, Kawaii Dake Janai Onnanoko, and Arigatights!.
Young Animal: Asobi Asobase is absolutely hilarious, with Gal Gohan being a nice romcom. Ueno-san and Jiken Jaken are both fairly funny to catch up on now and again as well.
Monthly Gangan Joker: I need to have a special shoutout for Yonakano Reiji ni Haremu Wo!!. Not only is the series a real gem, but the author is actually a really nice person. I've talked with them on Twitter multiple times, and they're certainly passionate about their work. Jahy-sama is also really funny, and Vegan Dragon is decent as well.
Morning/Afternoon/Evening: Honestly, there hasn't been too much from these that I actively follow. Major exceptions are Afternoon's Oogami-san, Dadamore desu and Blue Period; these are seriously super great.
There's a lot more that I read up on, but not really from a magazine point of view. Those are more series that seem to magically pop up one day on Reddit or Mangadex that catch my interest. For some reason, I tend to read series that are still ongoing or haven't finished translations yet rather than completely read a series that's already completed, maybe because it's easier to fit reading piecemeal into my schedule. Hopefully there'll be some nice discussion here!