>>94259342A battle does not mean an adventure.
Adventure is about exploring, meeting dangers and mystery. DB had so many cool places in contrast to Z's canyon, sky and city(namek was neat I guess)
DB had dungeons, castles, villages, korin's tower, rolling country sides full of strange monsters, dinosaurs and beast men.
searching for treasure, befriending bandits, mermaids, mummies and mammaries.
When you think of Freeza onward, it's all about the fights, all taking place in the city and it's outskirts(sky and canyons) playing as passable backrounds to whatever flickering character animation that passes for fight choreography.