The TDM is a solid bike, I like its sister the TRX, very good practical motorcycle. I see and have ridden with heaps of people that own huge power bikes and can't ride for sh1t. They go like stink in a straight line and then panic brake arms and legs flapping, then they look like they are using a steering wheel on a forklift going around the corner.
The sensible thing to do is work your way up to a big bike, and in all honesty you may never get that far, or get there and then go back to a cruisier general purpose type of bike. I've ridden and/or owned many bikes and I'm back with a general purpose type of bike, a Triumph Thunderbird Sport 900 and am happy with it. Not saying I'll stay there, but it does me for now. So I reckon your TDM 850 is an ideal bike, can be leant over, good brakes, good fuel range, will easily take a pillion and/or load [swag, tent, panniers/saddlebags], its not a boy racer, but its not a wobbly old cruiser either. You did well.