I'd like to do goalies, for the simple reason that I'm more interested in talking about them

Also, the goalie list seems less daunting.
I think 30 is a good number. By the time we get into 40-50-60, we're getting into some hazy territory where you could have dozens of equally strong candidates.
Based on the experience of the D list, I'd kind of like to see fewer inductions per round. Make a high bar for induction, and a more focused and detailed discussion in each round. One of the challenges in the D list was trying to develop complete arguments for/against every candidate in a short timeframe, and sometimes the results seemed to be driven by which candidates got the most discussion time. Fewer inductees per round will help prevent that dynamic from causing a bias in the results.