I enjoy the Zen of determining exposure with a handheld Gossen meter then setting the camera up . . . it slows me down, I like that . . . .
All good!
I very rarely (if at all, in actual practice) use the TTL meter for exposures — in more recent, awkward times it is used with the chimney finder. All of my metering is and has been done for years with a Sekonic L758D multispot -- this is much more useful in challenging lighting situations [using slide film] than the rudimentary TTL meter (though it must be said it is a capable meter)! And indeed you are correct the process of separate metering, being clinical and analytical, slows down the process to one that actually makes sense! A camera making all exposure decisions for me really rankles... Besides which, ye olde P67 meter only "counts" down to 1 second, when the majority of my exposures are anything from 10 to 1 minute or more!
The Pentax 6x7 & 67 does have idiosyncracies, a couple of which can lead to disaster with people unfamiliar with the consequences (meter coupling chain, particularly, something this camera shares with the Olympus OM4 cameras).
Everybody has their favourite(s), of course.
I tossed out the Hasselblad 503Cxi; I just did not agree with the boxy design in my hands, but especially the antiquated 80mm lens compared to more recent developments in the SMC Pentax 67 line up. There were also questions that the camera may not have been as well looked after by the previous owner as was assumed. The PME prism only worked intermittently which was a major annoyance.