The first Transformers movie sucked badly. Really badly. The first Star Wars movie was considered pretty awesome then, and has weathered the years pretty well (think about how many other special effects laden movies are treated well 45 years later). The second Star Wars movie was awesome, and is still considered good. I don't know about others, but the third movie was a major let down, bordering on the ridiculous, and seemed targeted at an age range half of the previous two movies. The prequels were... unmentionable, other than to hold them up to display how additional experience, wisdom, and financial capacity have exactly 0 bearing on the quality of a movie.