Like ZeaLitY said, ESB is generally considered the best of the 6. I think the most common order of best to worst is 5,4,6,3,2,1. The movies, however, can hardly be accused of being cliche. If they are, it is only because they follow an age-old folk tale archetype which countless other stories have done - it's made use of because it works. It might have been done before, but even something that's been done a hundred times can be redone better, and even if you Kyronea disagree with that, the majority of people will not. To most, Star Wars is the epitome of this sort of story, which few other movies do half as well.
That said, it's true that George Lucas isn't the best of writers. As a director he had his moments, however. Yet ESB is truely not his, except in the general story. The script itself is Lawrence Kasdan, who also gave us such things as Raiders of the Lost Ark and Silverado.
You are, of course, entitled to your opinion, but if you want to make an impact, you have to do more than come across as one of those self-indulgent movie critics who are always saying 'it was so boring, I fell asleep half way through' and other inane comments. 'Boring' is hardly an admissible critique, because it is incredibly subjective, and more often than not is used as an excuse in the abscense of any other criticism. In this case, it simply should not be done. The very nature of these movies as adventure movies makes them more visually and plot-wise exciting than most dramas, so it leads to a contradiction in the critic. Either they cannot endure anything short of a thrill-a-minute action movie, or they're not being fair. And the former does not speak well of their critiquing abilities. This is what is manifested in what you have said, and if that is indeed so I should think that the problem lies not with the movies, but with you (ie. you need to have more patience and the like.) Indeed, it is fair to say they are cliche, because they follow a VERY antique story type, and Lucas borrowed from things like LOTR, Kurosawa, and Dune (or so they say... the last two I don't know first-hand.) However, there is no problem in doing so, as most artist do this to some degree, and some of the best works of literature (ie. Hamlet, and most of the rest of the Bard's work) are if not borrowing another story, straight rip-offs of the stories, which he simply made immortal by his skill with writing.
So if that's honestly your opinion, that they weren't good, you've got to do a little more than throw around broad titles like 'boring' and 'cliche' like a third-rate critic would. Like ZeaLitY said, say a little more. All you're doing is repeating the 'boring' and 'cliche' comments, but you go into few specifics, and 'boring' and 'cliche' are really quite trite and meaningless critiques. Until you back it up somehow, it will remain an extremist opinion only (due to the fact that the fast majority would wholly disagree with you.) Tell me, what would you consider a 'good' and 'exciting' movie?
Lastly, Kyronea, you're posting this on a CHRONO site. Fun as CT was, it was the epitome of cliche. You can enjoy this, but not Star Wars? There is a contradiction here. See, the same sorts of arguments I would use to defend ESB and most of Star Wars in fact are the very same that I would use to defend CT: that it's a fun story, that it has a good mood, good music, fun characters, and so on. The added bonus to ESB which, in my opinion, CT does not have, is good character/costume and vehical/ship design (sorry, just don't like Toiyrama, his designs being a bit too childllike and overdone in my opinion... though in the context of CT, it did work to a large extent, and he's to be commended for that)... no other science fiction movie other than Star Wars has pulled off the sheer quality of vehical designs. The sharp and clear designs of things from Star Destroyers to X-wings to TIE Fighters to Imperial Walkers are immortal. The stormtroopers and the imperial forces are cleverly reminiscent of WWII German uniforms that it will never seem outdated (unlike, say, the Star Trek movies) and rather becomes timeless in that regard (only a few costumes seem by today's standards to be 'from the 80s'). Indeed, that might be SW's greatest achievement, that somehow it has managed to be timeless, and not feel dated like most other movies succumb to, in particularly science fiction. Finally, George Lucas' most lasting legacy: the works apart from the primary canon that he has blessed and allowed. No other movie or other work has such a large volume of sponsored works written by other authors, making the Star Wars universe one that not just Lucas, but hundres of others have contributed to. In Star Wars, he provided a wonderful creative opportunity for others, who at times have rivalled and outmatched him (a game like KOTOR is, in my opinion, greater to most any of the movies save maybe ESB and ANH.) He also spawned the whole Fan Film movement by allowing such things to be made, rather than bringing lawsuits and C&D orders against his fans (SquareEnix, are you reading this? Note on how you should treat your fans, and the success that Lucas had.) This is the direct consequence of the movies.