Favourite Transformer toy of 2015

[Ode to a Grasshopper]

I didn't get much this year (Maybe 30-odd TFs in all, and I've only opened half), and I haven't opened/messed around with all of the ones I did pick up, but there are a few standout pieces from those I have gotten around to experiencing.

If we're including 3rd Party TFs then MMC Feral Rex knocks everything else out of the park. The Feralcons are easily my favourite piece/set out of everything I own, and that's not likely to change any time soon.

My favourite Official TF(s) would probably be the Combiner Wars Protectobots. They're all solid, fun toys which look great as a team. I really wasn't expecting to be impressed by them, but they were a pleasant surprise. If I had to choose one out of them then Hot Spot is the best, but their charm really is as a set.
Legends Brainstorm rates an honorable mention as well, but he's really all about the robot mode - the alt-mode and the transformation are pretty naff. I forgot about him before, but I really enjoyed Legends Cosmos too.

The worst - by default - is probably Energon Slugslinger. He's not bad, but he is pretty fiddly and kind of ugly as well. He makes a good enough Decepticon mook - which is what I bought him for - but that's about it.
Runner-up Worst is definitely MP Road Rage, who also suffers from being fiddly and lacking dynamism/poseability, but the remoulding is quite well done and she does look good in either mode. She'll also be a mook in the Odieverse, but at least she's a pretty one. And she gets points by default for being the first female Masterpiece.