Nah, DBZ was the first one. Then DB. I'd watch some episodes of Pokemon with my brother who loved it but I was never too much into it. DBZ got me hooked in as soon as I had watched full random episodes. I could feel the tension, the stakes, the characters' charisma there that I didn't get with other cartoons, only other anime that at the time other than Pokemon I'd feel willing to watch was Naruto since my brother and cousin were fans too. My brother had the entire Naruto collection, remember I tried picking the first volume to read but since the artwork was hard to grasp and all, I didn't feel motivated to proceed with the story. One Piece seemed a DBZ/DB (watched DB part 1 entirely and really enjoyed it too) replacement but I found it a little lacking compared to the tension I felt with DB/Z
I think I had already created an attachment to DBZ before even watching it due to how commented it was, its fame here seemed to influence just how cool I'd look at it, but it had a special take on things that just made me want to binge watch it. At the time as a kid no other anime I bet would make me as willing. Saint Seiya may be one I'd be hooked in if I had watched it, my older brother (not the one I mentioned before) was a fan of it and before Naruto came as a "DB rival" here in Brazil, the spot would be previously occupied by Saint Seiya. Still though, DB had a special touch to me. The simplicity and at the same time high tension with the era I was in, I think it was just the perfect fit. Heck, if I never knew about DB/Z at all, never knew it was a hit and took the story from scrap to read all at my age I'd for sure enjoy it. Wouldn't think it would be the best manga or anything probably, but still would definitely recognize it as a worthwhile read and big entertainment.