I like changing mine to a different A.Net pic every few days as well.
There's so many....it's nearly impossible to decide which is best for that day!
With 162,437 photos on this site (as of this second), you could choose a different pic EVERY day until the year 2446 and never use the same picture twice!!
I wonder what planes will be shown on A.Net in the year 2446? Will ALL jets be supersonic then do ya think?