Big Twitter List fan as well, built Electoral (https://www.electoralhq.com/) to provide better tools for managing them. We had top lists for a while, and may bring them back, but they never changed. So, we built a search engine for them with over 14 million Twitter Lists indexed (https://www.electoralhq.com/twit...). If you're looking for list discovery tools, hope you check it out.
@joshdance If there is something specific you're interested in the search should work pretty well. Categories are probably the next logical step though.
Electoral
Summer Bod 2020
World Cup Next
Zapier
World Cup Next
Braavo
World Cup Next
Braavo
Bleepr