I agree, one some of his positions I dont agree with and two it is a wasted vote. This time I am voting for who I think will do the least amount of damage
Your first point isn't a reason not to vote for anyone, unless there is a candidate whose positions align perfectly with your own. I'll hazard a guess that you'll disagree with some of the positions of all the candidates.
The wasted vote idea is all well and good but the trouble with that is it merely perpetuates the badly broken two party system. The only way a third party is ever going to become viable is if the people who say a third party vote is wasted and fall into line behind the major party they dislike the least, actually decide to take a stand and vote for a third party. Whether it's the libertarians or the greens or whoever else, until people start to support them nothing will ever change.
One thing that would be awesome would be if people who know each other and trust each other, but who vote for opposing major parties, would be willing to make a pact that they will both vote third party if neither likes the candidate their own party has chosen. That way both sides can vote third party knowing a voter who would normally support the other major party is doing the same and thereby neutralising the effect of the so-called "wasted vote".