Shimano drive train!!
1st road bike had low level non indexed shimano shifters and they worked fine.
Next bike had indexed 105 on the down tube (many moons ago). Then went to mountain bikes (about 1987) with the first a Rocky mountain stratos having 7 speed indexed thumb shifters (Still working perfectly on this used and abused winter bike today, salt, dirt rain, still clicking). Got a KONA with SRAM grip shifters (thought they looked cool, hated them more than anything, I got blisters on my blisters, learned my lesson) swapped for XTR triggers. Built another KONA with XTR dual conrtrols my favorite by far. So I thought I would try another road bike and had to go with Dura ace 7800. Haven't ridden it outside yet but sure shifts nice on the trainer!! In all my miles the only problem I had with any shimano drivetrain was a broken chain and that was because I was lazy and reused the pin!