Back to the Future II: OK but unnecessary sequel. It had some nice moments (e.g. the "1980s nostalgia" cafe in the 2015 sequences, plus the plot riffed entertainingly on the idea that events were continually repeating themselves from one generation to the next), but really it just felt like a greatest-hits compilation from the first film-- like it was saying "here are all the bits you liked from the first film, writ a bit larger so you'll enjoy them more." Plus, science has exactly four years in which to come up with a flying Delorean.
Back to the Future III: Adequate but even less necessary sequel. Effectively the same jokes are told but in a Wild West setting, which I suppose has humour value in a kind of "the same things happen to the same people every generation" sort of way, but not only is it getting a bit dull and predictable, it also loses the element of irony the first fim (and to some extent the sequel) had, whereby we can contrast the aspirations, ambitions and personalities of the 1950s youthful characters with what they subsequently became in the 1980s. It's also made outrageously dated by being visibly set within the brief window in the late 1980s/early 1990s when Westerns suddenly became fashionable again for a moment.
Movie count for 2011: 54