Wow... this thread's up to 6 pages already? Lot's of opinions, huh?
While it wasn't my first bike, my 990A was my first ADV bike and I don't regret it for a minute... went from a Kawasaki ZX10R to a Triumph Sprint to a Triumph Thunderbird 1600 to the KTM.
I'm 5'7" and 145lbs and yes, the 990 is a BIG bike, but... SO much fun and it's performance inspires me to become a better rider. Yep... I'm not even close to riding it to its full potential, but I'm motivated and am getting there.
Don't let ANYONE tell you what you can or can't do, brother. (or in the words of Tony Montana... "The only thing that gives orders in this world is balls."