My favorite developer was originally Kodak HC-110. I recently made the switch to Ilford HC instead, in order to give my support to Ilford and take it away from Kodak. With the exception of TXP320 in sheet sizes and 220 size, Portra 100T, 400NC sheet sizes, and RA enlarging paper, I already used all Ilford and Fuji products anyhow. Portra 100T is GONE, and I have switched to HP5 for sheet film. I still use TXP320 when I want a black and white 220 film, and I still use 400NC for when I want a 400 color film in sheet sizes. And I will use Endura paper until it is discontinued, as I like it so much better than Fuji paper.
I like HC because it keeps well, it is economical, and is incredibly repeatable and versatile. I have never had any image quality issues with it, though some will swear on the Bible/Torah/Kuran/Other how crummy it is. I normally use it at 1:63 at 75F. I get extended times, more sharpness, more grain, lower contrast, and better shadow detail this way. These are all things I want.
I switched to ID-11 for a while because I was told repeatedly that it is the better developer. I personally prefer HC-110, as it is easier to work with.