What was the smallest group you ran and what was the largest? And what were they like?

Most people I've been told play with about 4 to 6 players with a gm. But not enough people talk about either small groups of 1 to 3 players + gm or 7+ players + gm.

So i want to ask a few questions. But 1st. No true solos. Playing by yourself is being both player and gm. I'm talking about your experiences running small groups and big groups.

So

1 what was the player dynamics. What kinda players were they.

2 how did character types differ based on the size. I hear it's common for small groups to play more generalists and bigger groups to play more specialists but was that specifically true in this group you ran?

3 how were character dynamics? I assume smaller groups fell more tight knit while big ones feel like a band of brothers ala 7 samurai/magnificent 7/large superhero teams/gi joe/transformers. Was this true for your groups.

4 how was the pace. I hear small groups (especially duets since the player only has you to talk to and nobody to debate plans with) are really fast while big groups can be slower.

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5 what games did you play. How did the game work with the non standard group size.

6 how did you design adventures/social stuff/combat encounters/ect ect with the group and their characters in mind.

Feel free to share other stuff about the groups if you want. I just want to see how non standard group sizes differ from the extremely common 4 to 6 range i see.

This is being cross posted to both rpg net and r/rpg