■ 🕑 41. 1. I can make the box slightly transparent if you'd like; otherwise, maybe some CSS wizard can help out. My CSS-foo is not great and I'm working on figuring this out for future themes.
2. This is a good idea and something I will implement soon.
3. This was attempted on https://0chan.vip (which also isn't fussy about "long lines") and it worked okay but also lead to most of the tags only being used a single time; other tags were abused, sometimes tags were duplicated; it ended up just being too much work to babysit. For now, if you want a specific tag, you can request it, or if I see a lot of threads being created that deserve their own tag, I'll add it. I think the current selection of tags is pretty good.
As a note, "general" tag should be used for any topics that invite more serious discussions, and "random" should be used for more silly or dumb topics. "Life" is for more personal topics or blog-like threads, while "society" is for things like politics, history, religion, philosophy.