What is the wall construction of the home?

Before making a recommendation about painting, you have to know what the vapor permeance and structure of the wall is.  Improper placement of a vapor retarder can have disatrous implications.

WoW Home Solutions

Sherwin Williams Duration Exterior Satin finish is the only way to go.  If you don't have the ability to reside or replace your paint-needing product with something maintenance free.... Duration.

A very quick and cost effective way to upgrade your homes exterior is a cleaning and color change. Pressure wash to clean it up and paint the shutters and front door.  They can remain the same color or pick a fresh new color.  You can also take any old fixtures that have faded over time and paint the metal with a fresh satin or gloss paint.  Same with metal railings or metal awnings. Possibly a one day job with big results. 

Are you looking solely for paint options or new exterior cladding options.  If the latter, go to everlastsiding.com.

Great product.

You can, but you should prime first. I recommend a good bonding primer like Stix or XIM