Welcome! Tons of great info on the DR here. This bike is probably one of the best all rounders I've ever owned! I've owned a few bikes too. IMHO... For my skills... It's a little big for the "dirt bike" aggressive stuff like jumping and single track etc. Not that it won't do it! It's a little small too for a 70MPH all day or even hours at that speed. However; I've had others say they have no problem with it on the DR.
I like this bike so much, I just sold my 2003 DR for.... a newer DR. A 2009 like yours. Nothing wrong with the old one but the newer one had some suspension mods and few other things I probably wasn't going to do to my old one so I let that one go after about 8K miles of my riding with just over 13K total. Excellent mechanically too!
It's not a perfect bike but it's close!
Motorcyclist Magazine had and article not too long ago about a 90 year old man who has like 125,000 miles on his. I think his was a 2005, not that it matters that much, they are all about the same really after 1996 with only minor improvements. All 125K with regular maintenance.
Where DR650 comes to life for me is the 90%. 90% of my riding are on back roads and the occasional gravel / dirt road / adventure rides. I'm beginning to think it is the best kept secret among soooo many motorcyclist. The 10% it's not so great at (for me) I mentioned earlier but I don't want to ride going 70 for hours anyway... and single track and jumping... not so much. So for me... it's a keeper!!!
The DR is lite enough for having fun. Quick enough to get up to and maintain 55-60 no problem whatsoever all the while with a fast heartbeat and a big grin!
Torque galore, easy and fun to handle. For me... It's more of an Adventure Bike. The simplicity of the machine is unparalleled in it's class.
Congratulations on your purchase and enjoy it!