Do "practical thinkers" tend to tamp down dreams? Here's a worthy and inspirational blog covering the 10 Lies You Will Hear Before You Pursue Your Dreams. Maybe the pragmatic points come from others or it may come from our own thoughts.
How many goals in your life have you not attempted because of this? If you have goals (and I hope you all have many) read that blog post. Then go ahead and take control of putting the cross-hairs on your target and go for it!