The gelding in this pic, Badger, and seen throughout the forum is also a QH. Peppy San Badger breeding, and it shows in his handling of cattle. Badger and I have seen lots of miles since we got him in 2005. He's 22 in the spring. Still ride him just for pleasure but his days of going up and down the mountains are behind him. He still likes to move cattle though, and rope once in awhile at brandings.
Then there is Dakota, a registered paint but we don't have his papers. He is 16 hands and was used as a rodeo pickup horse before we got him in 2012. Paints by nature I find tend to fret & worry more than QH's. Very easy to upset him and he needs a little extra time to figure stuff out so patience is the key word for him. But once he is confident with something he is extremely willing and game. I have roped some big stock on him. We ran 40 bulls at the big ranch I worked at a few years ago and he was my go-to for treating them in the big pastures. He's also very smooth at a long trot and a guy can cover lots of miles in a short time.
I can shoe my own if I have to but my back isn't great, and the knees are not much better. I have a guy that comes in and does them most of the time. I am assuming you mean the Canadian Sport Horse line? I have no experience with them but have heard good things. I know a lot of the big ranches here and in the US have introduced thoroughbred blood into their programs over the years to increase the stamina and longer stride. Some of the big buckaroo outfits in the Great Basin country like that. Hope this helps.
ps....there's also Houston, our QH lawn ornament, he developed osteoarthritis in his back leg, and now in 1 front leg so he has not seen any action for a number of years but he's my buddy and we frequently have long chats about current events and such. He's usually got good advice.
Too bad that happened to him, as he was a finished bridle horse in the vaquero traditions, spade bit and all. I won good money on him at a ranch roping one time. 
