I have over 16 years of experience in software engineering, as an engineer, tutor, team lead and project leader.
My key motivator is tangible progress, achieved by people.
If asked to describe myself in one word, I would say "enabler", or, "catalist".
If asked to explain "agile" in one word, I would say: "Why?". Meaning: please remember the "Why?" behind your product, software or whatever you're doing or creating.