What I would find quite interesting would be the comments/posts ratio. Easy to calculate and yet this value (usually) gives a good indication of the extent to which an account is involved here. The theory is that if someone writes more posts than comments, then their participation or interest in the work of other users is not particularly high.

And of course, exceptions prove the rule :-) remlaps-lite only has a C/P of 0.9 as you can see here. (small example follow list to show the C/P value)

number & value of bid/delegation bot votes

Probably wouldn't be that easy, outgoing delegations (in % of total SP) would perhaps be a sufficient indication in this context.