"I hope you will fill as I do, that ROTS leaves you wanting the next chapter, and that's all any film can hope to accomplish."
That can be taken as either a a plus for, or a negative against ROTS.
(But I'm sure you meant it as a positive.)I usually hate ranking, but I'll bite.
1. ANH
2. ESB
3. ROTJ/ROTS (I have to fast forward through significant sections of both, but they are still otherwise enjoyable to sit and watch.)
4. TPM
5. AOTC
TPM easily edges out AOTC in terms of overall watchability, mostly due to Qui-gon and Darth Maul. I do not like how AOTC focuses so much on the "relationship" between Padme and Anakin, and Yoda's duel distracts.