I found Budokai more fun than Virtua Fighter 4, that's for sure. It lacks substance and has plenty of flaws, but you can overlook those if you're a fan of the show. If you're not... well, it's still more entertaining than Virtua Fighter 4.
Of course, I have the PAL version - Japanese with English subtitles - and for some reason the story mode always makes me laugh. Especially all of Goku's lines and the one part where King Kai speaks in deep-throated serial-killer voice. Or the way I sometimes hear English words in the Japanese speech, like 18 saying "Feed a dolphin!" and Cell grunting "Who's the winner!?"
There are also some great translations too, like the Flying Nimbus being "Muscle Cloud", and Vegeta calling everybody "Aunt Sallies" or "meanies!" When Cell is defeated by Super Vegeta, he powers up and screams "Shucks!!", which is possibly the most entertaining subtitle I've ever seen.