I avoid chest, front of the neck, and unless I'm wearing the scent specifically so that I can track its development for a review, wrists and upper arms. When I spray in those areas, the scent is so constant and so strong that it seems quite likely that I would temporarily go "deaf" (I guess I mean temporary anosmia) to it. So I apply to my stomach under my shirt, and the back of my neck.
I can still smell today's scent (a sample of Byredo Pulp) after eight hours. Scents that are memorably long-lasting for me are Serge Noire, Oriental Lounge, Tea for Two, Chergui, and other oriental or gourmand scents. Heavy white flowers are fairly long-lasting; bright greens like Cristalle, Lauder's Jasmine White Moss, Miyake's A Scent, less so. Teas tend to fade quickly. Osmanthe Yunnan lasts about sixteen seconds, and I'm not positive that I'm exaggerating.