You are generally either a PLUS or not. And it’s more about sentiment and overall approach to life than it is about optimism or negative attitude. It’s a life path. And one I think you should pay attention to and perhaps cultivate.
In a week or so the hash-tag of your conference (#TEDxAustin, #SXSW, #SXSWi) will be a ghost town and the pages that are currently lit up busy with connecting will be attracting fewer and fewer eyeballs. And you can keep your vivid emotions and connective feelings alive through deliberate practice or you can let the “event” the “tribe” fade back into the interwebz, until the next event, or next gathering that you are part of.