Every smoothie needs either a banana or an avocado for proper texture. If you just do vegetables it will be too runny. I never make one without at least a banana. My favorite is a banana, an orange, and either spinach or kale. Lots and lots of leaves, way more than the recipe might say. Most recipes say 1 cup -- I use three cups of greens. Also, put in ice cubes when you grind it all up
what blender do you use? I have a blendtec and LOVE it!