I guess I'm an old timer (age 50) who shoots 4x5 and 8x10 but when I started out I shot a whole lot of 35mm film. When I was shooting 35mm I noticed early that almost all my best shots were done using a tripod. They were not necessarily sharper, just better. The reason being that when I used a tripod It slowed me down and I spent more time with my subjects.
This is my opinion about tripod shooting. Nice portraits by the way!