Well, depends on your taste, but i can give you my top 3 authors, all their modules are solid, some better than others but none of them are boring. As i was telling Rake on the other thread
Stephan Gagne: has some surprisingly good modules, pretty simple ones that are mostly story driven, the penultima series are their first modules and it shows, looks kinda cheap, the setting is interesting tho, imagine an utterly boring high fantasy medieval setting, where nothing interesting ever happens and where bureaucracy is the norm. Elegia and excrucio eternum are kinda fucked up psychological horror, the first one is a fairly linear adventure and the second one is more RPGy, you are in an asylum and discover that have been serving a derranged monster for the past 10 years or so without control over your actions.
Hex Coda i havent played because the 2nd part is not nor will ever be complete, a shame really as ive been told its his best work.
Adam Miller: His modules are a big campaign, shadowlords, dreamcatcher and demon are truly incredible achievements when it comes to scripting, youll see cool stuff, especially in the later modules, where the dude obviously was paying more attention to that than to the story itself. Still, it isnt bad, the character development is strong, especially in the later modules, but all of them present you with new or/and interesting concepts, like a town where no one can die, the defense of a japanesse dojo, riding a dragon and sinking a whole fleet, etc.
Fabien Ceruti: His series is the bastard of kosigan, still being made, is an awesome take on the medieval inquisition, demonic cults, witches, magic, adult themes like sex, betrayal, etc. lots of skills and attribute checks that would make most RPGs shrivel in comparison. Hes a french dude and all of his modules are in french, but most of them have been translated heard the 5th one is almost done translating and the dude is already making the 6th adventure.
I wouldnt say this are the best modules ive played, just that i like these 3 authors way of making them, as for other series: the Prophet series i heard is really good but never got to play it, the Aielund Saga is also pretty awesome, it is a bit linear but has a fair degree of C&C and takes you from a upstart adventurer to really great heights in a way that seems really natural, and that is hard to pull off, the writting is clever and later down the line you will notice that a lot of side quests are tied to the main quest, give context to the world and set up very good twists. Sadly the ending i remember it being a bit rushed, but it was solid non the less.
Nwn gets a lot of hate because its cool to hate on bioware and because of its abysmal OC but the modding community was really active.
PS: i remember i had a list with over 100 modules, half of them played half of them to play, sadly that list is on my old hardrive, ill see if i can get it back some day.
Todd Howard comes in
: "Games aren't defined by a list of bullet points... They're defined by the experience you want people to have." Game ships with only one feature on back of case: "Has real soul". Felipepepe : 
