98 was the first one I got incredibly hyped by - I had a big encyclopedia-style book with all of the squads and countries, I absolutely LOVED the Nintendo 64 video game (one of the best ever football games, imo) and I remember vividly the Beckham red card, but also random pockets of games against Colombia and Tunisia. As an Arsenal fan it also saw the rise of our future (or current) superstars like Henry, Vieira, Petit and Pires.
Also, the mascot was cute.