BEYONCÉ and 4 are similar in quality, B'Day is next, it's has cute songs, but filler brings it down, then IASF and DIL at a similar level. IASF has great high points, but I think a great album got lost in trying to make it fit the double disc concept and it's not v cohesive, DIL just in last place, it's cute when I listen to it, but I rarely do.. poor DIL
For me it changes all the time, but generally-speaking I think BEYONCÉ is her best album. It's very cohesive IMO sonically, and really mature thematically/lyrically. Next is a toss-up between 4 and B'Day. I think B'Day is more cohesive. It's a bombastic declaration of strength and ferocity! 4 is a bit more inconsistent, but it's highs are among the best of her career. A distant 4th is Dangerously in Love, which is salvaged by its brilliant singles. I Am...Sasha Fierce is quite dismal. The ballads are so anemic and lifeless, and the uptempos aren't very inspired either.