This is my favourite film, not fully sure why but it is, it could be because I relly like Ilford and 400ISO films, but maybe not 'cause I don't use Delta 400. This is a great go to film. It 'pushes' well, it can be 'pulled' so it makes it very versatile! Try it out and if you're dissapointed, try something else. Usually people are Tri-X people, HP5 people or puppy people. 

Here s what Ilford have to say about it:

ILFORD HP5 PLUS is a high speed, fine grain, medium contrast black & white film making it an excellent choice for journalism, documentary, travel, sports, action and indoor available light photography.

Nominally rated at ISO 400, HP5 PLUS produces negatives of outstanding sharpness and fine grain under all lighting conditions. It has been formulated to respond well to push-processing and can be rated up to El 3200/36°.

It’s wide exposure latitude makes it a great choice for beginners, those returning to film as well as the more experienced professional users.

HP5 PLUS can be processed in a wide range of different developers using spiral tanks, deep tanks and automatic processors.