i've had some pretty vivid dreams lately, too. though, i'd always had vivid dreams before starting to smoke.
mine recently have all been family involved, but with some real freaky twists. frankensteins monster, count dracula, the wolf man, etc. were all characters in one that i do remember somewhat. in that one, i walked into a building on the ground floor and went down maybe a dozen floors only to open a door to exit the building and find the doorway led nowhere and it was about a 20 story straight drop.