Excitement in a dream commonly reflects momentum -- a new possibility that's activated real energy in you, something you're looking forward to more than you may have admitted while awake. The feeling is usually worth trusting; it tends to point toward whatever opportunity has quietly been building anticipation in your waking life.
He that has too great a conceit of himself will be apt to fall into many errors in his judgement; yet on the other side, he that is too diffident, is not fit for this Science. - Cardan Girolamo (1501-1576)