Not Kingston, but I'll bite.
Take Irenicus' dungeon. Yes, we're probably sick to choking of that dungeon because most of us have replayed BG2 quite a few times, but even then it's got quite a bit of variety. The genie, the dryads, the pocket plane, the doppelganger on the second floor; even the trap-laden bedrooms strike you as being out of place, too pretty and luxurious to belong in the dungeon. You're told, in vague terms, about Irenicus' abuse of the dryads (a tidbit continued when you go up a level and encounter the elven queen's clone. This was back when Bioware understood what "foreshadowing" means). There're also more plot-relevant things the NPCs will comment on, Imoen's horrified muttering, Jaheira's shock at seeing Khalid's corpse and all. You have some of this in the Deep Roads with Shale tagging along, but DA's NPCs don't have much to say about the dungeons you visit beyond a few superficial comments.
Exiting the dungeon: Athkatla. The city alone offers you more things to do, more interesting quests to pursue, than the entirety of DA. Explore, poke shit, you'll find a quest or a bit of intrigue to lead you on. The slave ring under the Copper Coronet, the Planar Sphere, the Unseeing Eye cult, the circus in the Promenade, the playhouse, and so on and so on. Compared to Denerim, which is tiny (since you can only access one district until much later) and most of its side quests run along the line of "go look at the chanter's board/the mages' collective bag/the mercenary chest/the shady guy in the inn" and after that, there's not much left to explore. Cities in RPGs should overwhelm you with lots and lots of things to do/see.
No skill checks in BG2? Hardly any c&c? No problem, because it's actually fun.