All types of B&W films from the main manufacturers have their merits. I am a long time user of FP4 Plus and HP5 Plus films, but the T-Max, Delta and Acros are also excellent films. Film choice is a very personal thing.
I really like Kodak TMY2 for studio portraiture and it performs brilliantly in standard developers like D-76 & ID-11 diluted 1+1. The skin tones are superb with that film and I am sure that Ilford's Delta 100 & 400 films are as well.