on a serious note, I’m not that good a chess player, but whenever I have e4 played against me, I’m always stuck on what to play because it feels like there’s no good move. but when white plays d4, it feels more free, in a way that I can play more moves that won’t lose me the game instantly.
so I’d say e4 is better than d4 for me, because it’s a more aggressive move and leaves less potential moves for the opponent, but that’s just my opinion, others might have different views.
Depends what kind of game you like. The tactics in 1. e4 often wind down to a draw. 1. d4 allows more chance to play your own way. Also d4 is very slightly better, statistically. 1. Nf3 and 1.c4 are both very slightly better than 1. d4. 1. e4 is statistically the 4th best, so far as I know. But it really depends on what kind of game you like.