as some of you know, i'm writing a decentralized #foss reddit-like, not- #usenet server/web client called #tomo.

i'm at the stage where i need to make some decisions about how discussion groups are organized on the network, and i'd like your thoughts.

an open question for #fidoNet, #usenet and #reddit users of yore:

1. do you prefer nntp's hierarchical tree-style format for groups, e.g. alt.binaries.warez.ibm.pc.old, or reddit's flat organization of /r/mysubreddit? how about fidonet-style?

2. what's a reasonable character limit on group names? e.g. reddit enforces a 21 character limit on subreddit titles.