I use it to keep up to date on infosec stuff, and to hear about things some high-profile devs are doing etc - and I really like it!

IMO, as long as you stay away from politics, Twitter is great; you can probably say the same for Reddit and other socials too.

One thing that I do hate though, is the bizarre message threading model - it's just so confusing! All I want is messages in chronological order!