When I started using 4chan it was pretty much just /b/, but that was back in like 2008 before it was strictly a revenge porn board. I think sometime around 2010 I started going on /mu/. Back when they loved indie rock shit like Deerhunter and Animal Collective, before the modern era of Fantano humping. (Maybe it's not that bad really, I don't go on /mu/ much anymore).
In 2012 I got into anime when a friend showed me Madoka Magica, and I started going mainly on /a/. That was what I'd consider my main board for years, but I would also go on other boards if I ever wanted to discuss something in particular. Oh and around this time I was also pretty active on /vg/, in Katawa Shoujo General for the better part of a year (go ahead and judge me).
For a while I was enjoying /pol/, mostly in the runup and afterglow to the 2016 election. That was fun. But I think after Trump went full MIGA the board started losing its quality, and then when he lost in 2020 it just got even worse with all the denialism. Nowadays /pol/ is pretty much like going on Facebook and reading things that my insane aunts and uncles like to post about how they are in on some big secret about what's REALLY going on, and how they "do their own research" and such. I like to say that Biden did to /pol/ what Trump did to SNL.
Nowadays I mostly use /a/, /v/, /vt/, /vg/hgg2d, /ck/, /biz/, and /tv/ on rare occasions.
