Car Drawing Tip: Experiment With Your Car Looks

This time I'm practicing some mid engine sports car looks. Some times is hard (for those non designers like me) to come up with a look that hasn't been done already, or at least a design that doesn't look like
something that's out there. So by making a few quick sketches you can come up with new ideas you can latter put together to make a final drawing. I like the two cars on the bottom  but the first one kinda reminds me of a Mclaren 12C. See what i mean?