>>10420003I find the mainline very charming personally. Obviously it's not without its faults, but they work really well for what they are.
Optimus Prime has flaws (the feet in truck mode look like shit, the head on a swivel does hurt the posability) but apart from that, it's a very fun figure to handle, pose and transform, and that's what I enjoy the most so I'm satisfied with that.
Primal looks really good in my opinion, even if more ankle movement would have done this guy wonders and the bulky design limits the toy more than Prime, but the transformation is still pretty satisfying and the gorilla mode looks really good too.