The Arp catalog is based on characteristics and when grouped by Arp number those characteristics become more obvious.  

While I'd already completed the Northern Arp Program, Marie Lott, the program's coordinator suggested I'd get more out of it if I'd reorganize my log based on Arp number rather than order imaged.  Those results are below.

I'll admit that when I selected targets from the Arp catalog I did it based on RA.  Even so, I only missed objects from two of the Category/Subcategorys.  As suggested by Marie, I imaged representatives from those two groups and they are also included below.