You can do lots of really cool things with aliases! I just use them for insert text though!!
/alias add [alias] /input insert [text] will setup an alias that will be insert into text input box when typing
/alias add shrug /input insert ¯\_(ツ)_/¯
Some character changes:
/set weechat.look.prefix_error "⚠" /set weechat.look.prefix_network "" /set weechat.look.prefix_same_nick "” " /set weechat.look.prefix_join "--→" /set weechat.look.prefix_quit "←--"
/set weechat.bar.title.color_bg [number or name] /set weechat.bar.title.color_fg [number or name] /set weechat.bar.status.color_bg /set weechat.bar.status.color_fg
(add column to the left that features buffers. In place of bufferlist.pl plugin below.
/bar add buffers window 22 1 [things to add to bar]
There's actually a built-in way to connect to Slack via IRC, but there's also a Python plug-in which is more full-featured called wee-slack. And since Slack's IRC bridge has now been closed this is one of the few ways to use Slack in another client.