It's not that you two will find yourselves so similar; in fact, it's your very differences that will be the strength of this friendship. In a very real and measurable way, you'll help each other achieve your goals by bringing unique gifts to the mix. You have the drive, energy and original approach needed to get projects off the ground, and your buddy has the practicality and determination needed to see things through to the end.
This will work well for your friendship in general, as well as in terms of creative projects if you decide to take some on together. Just make sure that the lines of communication stay open if you want to make the most of this potential. This aspect will lend a certain durability to your friendship. You'll depend on each other for the qualities that you lack on your own.