I was poor and rented boats when TMs first came out and stern mount was all that I could do. So I had ample experience with that setup.............however, I do/did not "Backtroll" like is done up North so this doesn't apply to that setup where I'm told transom mount IS the way to go.....why, later herein.
It's been said above and I will toss my hat into the ring. Had a 1971 16' Chrysler Sport Fury tri-hull with a bow mount. Can't say that the hull shape was a problem or enough of a problem to bring it to my attention while operating. What the tri-hull DID do was to give me a wide bow platform whereby I could mount the T.M. to the side and have ample deck space left for loading and unloading passengers from the bank, unlike is found with a mono hull which I used for fishing after that boat.
I think things like cruise ships of today bring the point home on where to locate it. Why do you think they have a horizontal driving propeller near the bow of these ships and other ships that have to do on their own? The reason is the same reason you need a bow mount. You can pull against tide and wind a lot easer than you can push (from the other end) and be more precise. Less thrust required and better control.
That about sums it up. Besides, if your chair is right there you have a birds-eye view of the potential action while fishing and can stay with a fish with the boat positioned as you choose.....like moving out of a bunch of tree stumps to open water to safely land a "Lunker" Bass.
Just keep in mind the other anglers out with you need some consideration too so ever so often, turn the boat broadside while fishing down a bank and let them have the "first water" shot too. They may go out with you again. Grin.