"The enthusiastic, to those who are not, are always something of a trial."—Alban Goodier

Many years ago my employer called me in to meet a younger man who was applying for a job with our employment firm.  When I was introduced to him he leaped up excitedly, shook my hand, and exclaimed how great it was to meet me.  When my boss asked me later what I thought of him I told him I didn't quite trust anyone who was that excited to meet me.  (He got the job anyway)