The only hesitation I have is this: is life long enough to try all these developers?
One of my favourite paper developers is D-163, which I sometimes home-brew because I've not seen it on sale in camera stores for years. I also like Amidol. But I have to admit that squeezing the last ounce of technical quality out of a print is usually less important than squeezing out the last ounce of aesthetic quality (the latter being a lot more difficult). If a print on MG WT is going to be good, in most cases it will be effectively as good in MG dev as in D-163.
Most of us have limited time to spend on photography, so it's a question of where the time is better applied: trying new materials/chemicals, or taking/printing more pictures. I won't criticise anyone who wants to try new materials/chemicals except to say that it is possible to overdo it.
Cheers,
Roger (
www.rogerandfrances.com -- where the latest gallery addition, '1000 motels', is [dare I say it] digital, though the vast majority is 'real' photography.)