Issue
Hands in VR are not properly aligned with your hands in real live when holding Index controllers.
They are slightly tilted inward when looking onto the front of your hand. If you let your arms hanging loose your handy will actually be tilted back a bit.
See pictures below for further clarification.
Suggestion
Tilt the VR hands slightly outward to better match how you hold your Index controllers in real life. This would make your hands feel better/more realistic in VR.