It can be challenging dating an extrovert, especially if he/she is in the extreme side of the spectrum. Though the same could be said of extreme introverts dating each other, which I think would be such a bore. So, I guess my point is to date people who are balanced...meaning, people who like to have fun and are engaging but at the same time who acknowledge the need for solitude and reflection. You need the interaction of both worlds, the dance with the yin and yang.
I've dated the extreme sides, unfortunately. The extreme extroverted is like that nagging side of you that reminds you that you don't go out that much, that needs to exercise, that needs to make more friends and that overall you're a loser. The extreme introvert just...well is just there. Nothing happens, and then the relationship just dies. I have yet to find a healthy balance.