Tri-X is such a versatile film that I consider it to be good enough for most B&W shooting. However, there are situations where certain other films would be better. FP4 on sunny days, Pan F for landscapes, or T-MAX for extra sharpness, etc. If you've got a specific type of shot in mind, you might load one of the aforementioned films, but if you just want a film that can cover almost any situation you might encounter, then Tri-X has got you covered. As for the age-old Tri-X/HP5 debate, they're just different takes on the same concept. They're both really good films to use. Tri-X is higher contrast out of the gate, so you don't need to fiddle with it to get striking images. HP5 is definitely flatter, but that can be a major benefit when adjusting things either during scanning or printing. Back in the day, lower contrast was preferred because it meant that you had more control over what you got in the final image.