Do I bless or curse?

An idea that I've been thinking about lately is how I think about myself and others (and therefore how I talk about myself and others).
Do you often start out with a blessing and end in a curse, or do you do it the opposite way around? Here are a couple of examples:
Blessing first:
She has really good people skills, but she has never even finished reading a book.
Or, blessing last:
She doesn't read many books, but she can read people really well.

With the idea that we are likely to remember the last part of a statement, I am challenged to end statements with hope rather than with negativity. The more I think about it, the more I notice the way I think about others and myself...and the more I am trying to train myself to end on a positive note.