I'm a sucker for any connector that has a nice solid spring load mechanism that pops into place when properly connected. It should sound like a movie sound effect of a gun being reloaded.
I've also used some really nice quick release steering wheels, like on race cars or racing sims, where they have a spline connector with a tight fit and a good spring load.
I don't think it's too confusing to combine Mastodon natively. Reddit was filled with screenshot and links of Twitter, so if Mastodon is the Twitter replacement and kbin is the Reddit replacement, I'd much rather have the posts natively federated than reposted with the author having no idea.
If implemented correctly, comments on kbin would appear to mastodon as replies to the post, right?