People are walking with the strangest things on their feet, but for me good leather walking boots are a necessity. But nobody can tell you what boots are the most fitting for your feet, so you should try several brands and models before making a choice. Remember that boots should always feel comfortable even before they are broken in.
Boots should preferably be all-leather with GORE-TEX® (or equivalent), good ankle support and a VIBRAM® sole (or equivalent). The lacing on the ankle should be as independent from the lacing on the foot as possible. Personally I recommend boots of Italian origin, which in my opinion have unsurpassed quality and comfort. Good brands are e.g Crispi, La Sportiva and Trezeta.