Yeah, same here. I've tried to systemize the conditions a lot of times too. The thing I came up with for me and my stutter is the thing of utmost importance comes down to what I've very vaguely labeled as "the situation". One big factor is definitely the person I'm talking to and how they interact with and react to me and my stutter in the conversation. Then, of course there's the context where the conversation is embedded in – for example when I'm on a time limit, it always makes my stutter worse because of the stress it puts on me. Then, there's also smaller factors like the subject I'm talking about – some things are harder to talk about than others. For example, I can't tell jokes or do accents for the life of me. Basically, everytime I try to me funny verbally, it makes my stutter worse which is why I often resort to other forms of being funny