I love football, especially college. It is an exciting, strategic, crazy display of Army style discipline with fantastic athletes. Explosions and graceful leaps in the same play all over the field. Testosterone raging at their highest levels. Great combinations of speed, strength, agility, throwing, catching, etc. Only the strong survive. It can be enjoyed both at home on TV or at the game.
Baseball is summer. The sights, the sounds, the smells, the food, favorite beverages, the crack of the bat, the gymnastics of great fielding, the pitching strategy, the hitting guessing game, the synchronized movements when the defense controls the ball while the offense hits it and runs is so mesmerizing - at the game. Not so much at home on TV until the playoffs. 
If you really understand both sports, you know that the skills, player development, game strategy, etc. are both very complicated. With football, more injury issues and adjusting to radically different styles of play of opponents with more players from both teams on the field. In baseball, arguably the most important player only participates every 5th game on average. It's like having to field 5 different QB's every 5 games. The monotony of so many games wears on the mind and heart as well as the body; so rosters with players with strong mental states that maintain great focus and durable bodies despite the grind tend to win more.  
I will never forget the Big Red Machine in 1975-76. Arguably the greatest combination of hitting and fielding that has put a cleat in the soil in modern baseball. I also will never forget  Joe Montana and the 49ers. Pioneers of a different, West Coast offensive style that moved the game forward in a much different way with a QB that could perform magic. 
Love them both for different reasons. In today's world, football is king in America. Baseball is king internationally when only considering the two sports.