seoinage. Just because its such a powerful throw(hoisted over shoulder/back) when the opponent is loaded, that 'it seems' all you really have to do is 'get in'. Not much of a reversal threat either.
ippon or morote?
Used to be uchimata when I competed (yes, I'm an old fart), but now I prefer drop seoinage (off the lapel instead of going to the arm side, and exploding forward so even if it misses your opponent doesn't get your back, important for BJJ..
Uchimata takes more explosiveness and flexibility to do properly, a lot of older folks move away from it for that reason.
I like both but I use ippon more. I can't do left morote tho. My left elbow doesnt wanna bend under like that.