A door with a window would also be more inviting, or paint the existing door a fun color.

Should we paint them a lighter color?  

The house is cute just no pizazz with that color scheme.

From what I can see in the pictures, it needs some landscaping work to create some curbside appeal (some bushes and dead grass areas fixed), the basement needs to be finished (completely dry-walled, needs paint/flooring/trim), upstairs needs paint/carpet (mostly good condition, just old/dirty/strange colors).

We will not be coming to you for paint colors and conflict resolution. 

I hated getting the complaints from SFH renters that they hate the paint color or the light fixture looks old, etc.

Here's another tip: take a photo and print out in color to show dramatic proof.

Works out economically if you are using the same color in most of your properties by buying larger volume of the better paint especially when you catch it on sale.Best Regards,Brian

Siding is two tone colored (white on front/rear and light brown in the back).

I did not read the case cited, however adverse possession has nothing to do with these facts and circumstances.Laws concerning water rights generally come under riparian laws.Adverse possession laws related to either color of title (I.e., relying upon a document that appears to pass title or some interest) or a claim of right (squatter).Easements can be formed by act of law, claim or affirmative or involuntary transfer and may be the area of law that merits further study, in this case.I've been involved in each and every one of these type cases, and each from both sides.