[MakeshiftWalrus]

This might be quite late, but I sat down and glanced over the most popular ones on the site and opted to compile them into a neat little list. I don't personally like either of the two choices.

https://www.phpbb.com/customise/db/style...t/demo/3.2 - Akin to the old forum, if a bit darker. It's sharp, fairly easy on the eyes and not cluttered with jarring clashes of colours or tainted by modern aesthetic. It can also be coloured in any way one would want, from the looks of it. And this would be my personal choice.

Preview:


https://www.phpbb.com/customise/db/style...e/demo/3.2 - Much darker. It does away with much of the lighter colours and replaces it with a variation of lighter and darker greys. Very easy on the eyes as a result, but perhaps a bit dull.

Preview:


https://www.phpbb.com/customise/db/style...n/demo/3.2 - A mixture of bright and dark, splashed with a bit of colour. It's rounded compared to the other two, but compact and easy to get an overview on. This one can be customized in terms of colours as well, just like the first one, if blue was the colour of choice, rather than red.

Preview:


These were all chosen from the 3.2.x list, which I assume is the most up-to-date one, for the most compatibility with the plugins you mentioned.