Default modeling window in Rhino is perspective window. You have to learn how to create your models in this view. This view gives a complete control on your model. If you are tired of maximizing this window every time rhino starts you can use that simple script on start.
Simply paste this code in the text box on Tools > Options > Run on startup
_SetMaximizedViewport Perspective _Enter _-ViewportProperties _Lens 35 _Enter
First line makes perspective view maximized and the second line sets lens for that view.
You can also make use that code in a rhinoscript (*.rvb) file.
And then add this script to your startup scripts as seen below.