I am at that stage where I am sampling everything. Film, developer, formats, camera bodies, lenses... It's all good.
At the moment on my dev shelf I have Adonal, Xtol, ID-11, Microphen, Ilfosol 3, Preparation H, Perceptol, TMAX Dev, and Ilfotec. I have actually used XTOL and TMAX Dev. There is neither rhyme nor reason for this nonsense.
And there's a bunch I'd like to try, including caffenol.