My husband likes Sandalwood & Vanilla (Brambleberry). I made some Dragons Blood (Brambleberry) soap and it smells great, however, it does discolour brown, even using titanium dioxide. Other men's fragrances would include Energy (Brambleberry), Sandalwood, Amber Oakmoss (NG?), Joop Homme, Spiced Mahogany (BB - accelerates & discolours), Bonsai (BB).
With essential oils you could go with anything woody, minty or citrusy. These come to mind as being not too expensive and work well in cp soap - Eucalyptus (alone or in blends), Tea tree, Star Anise (in a blend perhaps), Cedarwood, Lemongrass, Rosemary, Peppermint. I'm sure you could come up with heaps of combinations.
Have fun!