Morgan Arc: I give it a 7/10. It was a pretty cool intro for OP, had some comedic parts, however, it was little short in my taste.
Buggy Arc: 6/10. Wasn't too thrilling, hated how Cabaji fought and how Mohji didn't fight at all, but it was still pretty nice to know a lil' about Shanks' past, and nice to have Nami join.
Kuro Arc: 9/10. I really loved the story in this one, liked Kuro's plan and all, and liked how Usopp stood up to them. However, if more was added to the plan, and if there were more battles, that would be even better.
Baratie Arc: 8/10. Sanji kicks ass. Kinda sad to see Nami and Usopp not fight. That's one of the few flaws, another would be that Pearl getting beat by Gin instead of Sanji. Then it evens out, at the Gin and Sanji battle. Oh, and nice to hear about Sanji's past, It's one of my favorites.
Arlong Park: 9.5/10: This was the best Eastblue arc. I think Oda could've gone deeper in the Arlong vs Luffy battle. But that's the only thing I found bad. Nami's past was really sad, but not my favorite.
Loguetown: 8/10. Like someone said, it was good, but the fillers were getting annoying.
Reverse Mountain: 8.10: Really short, but nice story.
Whiskey Peak: 8.5/10: Zoro's such a bad ass in this arc. Killed every bounty hunter. I liked the Luffy vs. Zoro, and they just knocked Mr. 5 and Miss Valentine out of the way. Thought the battle ended pretty weakly though.
Little Garden: 5/10. MR. 3 IS A RAPIST. His voice creeps me out. The battles were disappointing, but it was still pretty entertaining. Pretty cool about the 100 year battle.
Drum: 8/10 I liked this one, and Chopper's stories was one of my top three. Thought it was pretty sad. Everything was great, except there were only 2 fights.
Arabasta: 10/10. It was a good, long, serious arc. It showed that the world isn't all peaceful and waiting for pirates to come and sack the place. I liked the story overall, and the Strawhat vs. Baroque Works battles. Sad to see Vivi not joining, though. =/
Jaya: 9/10. Not much to say, but I REALLY wanted to see Luffy kick Bellamy's ass every time he spoke. Glad to see Luffy present to them their differences in strength. And I felt sorry for Montblanc Cricket.
Skypea: Eh, 8/10. This wasn't a bad arc, just the fights were pretty disappointing. Would've been even more interesting if we found out about Enel's old sky island, and the invasion to Skypea. Disappointed on Chopper's fight… and I liked Zoro vs. Braham, but Zoro vs. Ohm was too short. Noland and Calgara's past also makes my top three.
G8: 10/10. This was my favorite filler. It was really entertaining, and Usopp and Condoriano scene was one of my favorites. :p
Davy Back Fight: 9.5/10. Nice to see the OP world isn't all about pirates killing each other. I have a soft spot for these entertaining, comedic arcs, I guess.
Water 7: 10/10 I think it had a good story, all the shipwrights made me wonder who would be the SH shipwright. I thought for sure it was gonna be Kaku or Iceberg (for some reason) and they would work together to fight Franky Family. Heheh. Other way around. We get to see Robin in action, and showing her true side. Nice to see Usopp and Luffy fight, shows that crews aren't perfect. I also felt bad that Merry couldn't sail. Nice lead to Enies Lobby. Franky's past was entertaining, and made it into my top 5.
Enies Lobby: 10.5/10. This was a really great arc. I liked the sea train battle, and Sogeking. I liked Luffy trying out new techniques. Sanji's devil kick <literally>kicked ass, Zoro's nine armed thingy attack was bad ass, Sogeking didn't do anything but he was cool, nice to see Nami win a big fight, nice to see Chopper beat someone and his Monster Point was total kick ass. Nice to learn more about Franky and how he fights, too. AAAAnd, nice to see Robin beat the hell out of Spandam. Liked the end where they all ride on Merry together.</literally>