Not much has changed in regards to my opinions of the actual characters. Except maybe Prowl, I used to love the guy as kid but now I only sort of like him. Jazz I never really cared for, but now I'm just loving him(except you Movie Jazz I still don't like you).
Toy wise my opinion keep fluctuating. About half of my collection consists of BW and Armada. Out of those two series I pretty much really dislike the figs I have. Only exceptions really from BW are Depth Charge, Tiger Hawk and a few basics I have. Everything else is just a "why the heck did I want this again". Armada I have similar feelings for. The minicons I still love, same with bendy prime and thundercracker. Everything else though I really don't like (I'm looking at you sideways

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My G2/Reissue's I still love to death. Although I'm kinda wondering now why I bothered getting Red Alert. I was never a fan of his character and the toy is just Sideswipe in different colors.
BM I pretty much can't stand anymore. Only got Spystreak and Mirage from the toy line. Looking back at the show I wonder why the heck I even watched it.
Rid is mostly misses for me. Still loving my Scourge and am ever grateful that I have such an awesome mom who got him for me along with UM.
Energon/Cybertron broke what armada started. It was these three series that actually thrust me into a huge dark age. Didn't actually come out of the dark ages until I heard about SDCC Nemesis and the other Universe 2.0. I just utterly despise everything to do with these two series. Only figs I have from either are Scattorshot and Armorhide which I got in a buy one get one free type deal and that plane omnicon. I really wanted scattorshot back that, but now I don't really like him. Armorhide I really hated, but now I love the little bugger. That plane guy I actually like alot, I just wish those missile things would stay on better.
Alternators I liked alot as a series. I do wish I had found more other then just Grimlock and Tracks. I'm still kicking myself for not getting Wheeljack when I saw him. Design wise I like them alot. They took a whole new spin to the transformers line. Toy wise not liking them so much. Better to display not to play. I keep getting paranoid whenever I touch Grimlock that he's going to break.
Classics I wish I had come out of my dark ages earlier to get some of these guys. I'm glad TakaTomy came out with the Henkei line, but they don't have cliffjumper though.
The movie line I just never liked. Then again I didn't like the movie either. Yeah I said it. Aside from Scorpy and that crazy rabid little cellphone robot I didn't like anything about the movie. Toy wise I think I only like Stockade because he sort of resembles a monkey and I really like monkey's.