beats/production
production needs to be consistent, & have depth...tracks need to sound unique, while still maintaining tha overall feel of the album. which is why i recommend relying on just or (or 2) producers all the way thru. a different producer on every track hardly ever leads to a classic album, IMO. also, having that laid-back funk-ish westcoast vibe to tha beats helps alot. & don't be afraid ta give tha beats a lil shine, if you got tha rite production, don't cut tha beat off as soon as tha verses end, let it run a lil bit longer. same goes for the begining of the track. tha worst is when an artist jumps rite into his verse tha second tha track starts...that hardly ever works. if you want an idea of what i like when it comes to new beats, listen to G-Macc's album The Graveyard Shift...that shit's got some genuinely classic beats on it, & it came out in 06. another recent album with incredible production was Phonk Beta's Phonkphenomenon (his beats never disappoint). goin back a lil further, Ecay Uno's Mental Scars was another great one (03).
lyrics/concepts
most classic albums i know of don't have any radio friendly tracks. fuck all that hyphy/crunk shallow-lyrics-havin club shit. lyrics should be well thought out, origional, & clever (& being "clever" doesn't necessarily mean you need crazy punchlines or anything). draw from personal experiences & be real with it. modesty is key (see: Mental Scars)...i don't wanna hear about money, expensive cars, and bitches. this is why c-bo fell off. deep tracks are a must, some reflective type shit......something people can relate to. if you can make an album that has listeners feelin like they know you after its thru, then that's a huge accomplishment. & there should be at least 1 track that tells a whole story just for tha sake of tellin a story ("brenda's got a baby," "rescue 911," "goin out like geez" by mc eiht, "talez of a killa" by woodie, "dance with the devil" by immortal technique, etc). when done rite, those are tha tracks people really remember. another dope idea that i think is under-used is when artists trade verses/lines with eachother like they're havin a conversation, to tell a story (1st part of "5 on it *reprise*," "its all bad" by biaje, "rescue 911," etc). & like someone already said, don't over-do it with the features...cuz then it won't feel like a true solo effort. also, keep the skits to a minimal...& NEVER ever attach them to the end or begining of a song. fuck that. they need their own track so they can be easily skipped. not every track needs a chorus...flowin for a few minutes straight without one always catches my attention & stands out. oh, & there needs to be at least one weed track on tha album lol, somethin to smoke to...its not mandatory, but its a nice bonus. nunna that thizz shit tho.
& i think that's about it for me...just my opinion on what goes into making a great album. hope it helped...& if not, at least i passed some time by typin all that shit up