Yeah maybe your right about the Jaguar ones. Do you have any pointers as to how I could improve the others?
I find it next to impossible to get realistic shots straight from GT5, hence I always used Photoshop to enhance my shots (before I lost Photoshop anyway

) ... don't be afraid to crop your images and resize them (you are a cropper, after all

) - sometimes a smaller shot can sharpen things up a bit. Avoid wet circuits unless you're brilliant at editting... every image I've ever attempted on a wet circuit looks horrible... try using circuits that have changable lighting, like Spa, Le Sarthe, Nurb and see what you can do with different time/cloud settings.
Otherwise, just check out as many galleries as you can and see what others are doing in terms of composition, editting etc. and you'll not go too far wrong... everyone has their own personal view as to what 'realistic' is, but I personally like understated shots with subtle editting that just look 'normal' as opposed to what you might often get from the Photomode locations i.e. ultrasharp 'showroom-like' images...
This is a good example of what I'd call realistic...
... looks like an image cut straight out of a car magazine.