I wonder if that's the case... I'd consider myself an extrovert, but when I'm alone I don't really feel drained or anything, just kind of at peace and doing my thing. And when I'm with others I just get extra excited and motivated, I guess I do need other people once in a while to tell about what I've been doing or working on "when alone" to keep myself motivated, but that's about it, I never really get a feeling of exhaustion or needing to "recharge".