Some things that come to mind (I am sure at least some of this has been suggested before)

• The front page seems to default to all for me every time I load it instead of subscribed. This may be user error but I’m not sure.
• The menu to select subscribed is kind of hard to find and it’s a bit annoying to click through to it every time I hit the home page and just wanna see my subscribed stuff
• I wish the reply box was right below the OP as opposed to at the bottom below all replies
• Would be nice to have the live preview of your post/comment feature like Reddit
• I wish that typing /m/magazine created a working link to that local magazine automatically
• The aspect ratio thing on image previews
• Would be cool if Kbin had a RES (reddit enhancement suite) style inline image expander thing
• Don’t currently understand the magazine badges feature. It seems like a half implemented subreddit flair system, but I’m not sure? Would love post flairs at some point down the line
• the read more down arrow bar thing on long comments is maybe a little unintuitive

Also if this is not the right place to post suggestion box stuff, let me know. Possibly it might be cool to have a suggestion box type forum where people can upvote suggestions they think are worth investing time into. I’ve seen that done with other software dev projects before.

In any case, great work so far. I donated a little money at https://www.buymeacoffee.com/kbin just earlier today