On my PC when I open Blender I always need to manually press maximize button on the window. Is this just something on my PC or is this how Blender starts?
Is there anything I can do so that it's always open maximized?
It's controlled based on the window when you save your startup .blend.
To make it default to maximized:
Maximize the window.
CtrlU> Save Startup file, or File Menu -> Save startup file.
Note that if you make any other changes (not including the splash screen), they will be saved as defaults as well.
In windows look for the icon you use to start blender. Right click to bring out the contextual menu, select Properties an in the target path add -W at the end.
Blender will open maximized with no borders.
(for windows 8 go to the start menu, right click on the blender icon and select Open File Location That will bring you to the folder where windows stores the shortcut used to open blender. Right click on it to access the properties and edit)
Blender 2.80 (it's still in Beta but you can get it here: https://builder.blender.org/download/):
I know this thread is quite old, but, since it is - at least for me - the first result for the search "blender star maximized", let me share my solution (windows 10):
First, I did what @gandalf3 said, and saved the start-up file with the window maximized. Still didn't work.
Then, instead of using the desktop shortcut that is automatically created after installation, I actually went to Blender's folder (C:\Program Files\Blender Foundation\Blender) and opened Blender.exe directly and voila, it worked.
So I deleted the desktop shortcut and re-created it by right-click dragging "Blender.exe" to the desktop and "Create shortcuts here".
It is very strange, since the new shortcut has the same target as the previous one, but hey, it worked so I'm not complaining.