I used to wear cowboy boots when I rode cruisers and never had a problem. I suppose as long as you don't have a problem getting your toe under the shifter and your other one on the brake most anything comfortable will do.
I just bought my first real pair of motorcycle boots in 40+ years on riding. Wore them for the first time today. They are Tour Master Response Boots. I too have sort legs, a thirty inch inseam and have been a little worried while wearing and trying other boots and shoes on the NT. These boots work fine for me. I wish I had bought them sooner.