1-Favourate Dragonball series episode ?
2-Favourate Beyblade episode ?
1-Not exactly a huge Dragon Ball fan (I prefer Pokemon and especially Digimon in this genre), but would maybe go with episode 101, The Fallen, where Goku and Tien Shinham finish their battle in the air.
2-I am a big fan
First season - Episode 16, My Enemy, My Friend, where Ray and Mariah play each other in the Asian tournament
V-Force - episode 90 (39 of the series), The Bit Beast Bond, with Tyson and Ozuma figthing it out in the amusement park, one of the best beybattles in the entire series and some awesome dialogue and introspect into Ozuma's mission.
G-Revolution - Episode 125 (23), Ray And Kai: The Ultimate Face-off..., where Kai and Ray have an epic beybattle in the World Championship, and episode 48, Beyblading Spirit, where Kai gets his revenge against Brooklin.
Overall, probably episode 90.
I don't like the new seasons, they just replaced the whole cast with dull characters and ridiculous plots
For me, Beyblade will always be about Kai, Ray, Max, Kenny and even Tyson.