Ironhide FTW. Ratchet comes in a close second for its sturdiness. Starscream for the Decepticons, followed by Bonecrusher and Voyager (Metallic exclusive) Megs. Longarm for honorable mention.
LC OP's got electronics that doesn't sound right (compared to the previous Armada/ Energon/ Cybertron releases). plus he's got all those kibble on his back and the back of his legs that limit his poseability. that's why i'm not getting the LC Megs or Brawl, nor any other Movie leader class releases in the future.
BB's way overhyped, and i'm glad i got mine during the very first wave of movie releases thus sparing me from the scalper/hoarder troubles here (yes, even here there are scalpers. word.). in fact, i got 3, but sold the other 2 off because the hype soon waned on me. i also got disgusted by the inflated-price market value it gained on eBay.ph, with unscrupulous sellers selling it for 2x-3x it's actual price.
Jazz...hmmm, if he wasn't a HTF figure nowadays i woulda rated him higher, but i wonder why did they ever shortpack him when he's not fairly remarkable, with the ugly forearms and such.
Arcee? very flimsy plastic. if not for it's uber-cool bike mode this toy is meh. of course, i hadn't actually broken mine or stressed any part, but the plastic feels quite cheap for the price point.
i used to collect Decepticons but sold 'em unopened, i dunno, i decided not to go completist on this line (though i could have), just buy the ones i really liked. IMHO the movie line is the worst line to go for completists and openers; once you're used to the previous TF lines, the poor QC and complicated transformations (not to mention the unreliable automorph) of the Movie line will really get into your nerves.
but that's just my opinion, if you want advice then just go buy the ones you like; what i didn't like might not necessarily mean that you won't like them also.