Years ago I worked my way through Pentax and Canon - before landing safely on Leica M. It also took a while to forget about all the rest of gear it could still try out, and from then on concentrate on the image for a period. Then the really good images started coming in...
I then spent some years as a therapist, actually selling ALL of the gear... Never thought that would happen at all!
Now I have been working professionally for a year and a half again. The strange thing is that I have somehow been forced through the same process again, especially when it comes to digital. Fortunately I havent had to buy & sell as much as before, but just researching and testing options is actually quite some work!
I now feel I have a good combination of DSLRs (that I continously want to trade for an M8 nr.2), an M8/R2A/L combination that is just great - and a full set of old Mamiya RZ67.
I am quite happy with how it is, but would add some really good glass for my Nikon DSLRs if I need it to get jobs. I will try to add a second M8 anyway, and feel that I would really benefit from using a Mamiya 7 sometimes...
I hope that is it! The M and maybe Mamiya gear is what I would choose personally, and the Nikon DSLRs are acceptable to get cash in - although I do not enjoy them...
I guess this is a job that a serious photographer has to go throught - either in search for a style, or for a particular project. I travel a lot to Budapest these days, and would really like to test out a good film-based panorama camera there. If there was money in that particular project I would buy one off the shelf... The strange thing is that I might not like the camera itself, and might sell it off as soon as I feel I have done a decent project with it...
So, I guess it is about getting the right tools - and then forgetting about the tools themselves... Hard sometimes, though!