E4 or D4?

What are your opinions?

Both. Anyone below master level should see as many structures as possible while learning.

If I had to choose then it's 1.d4 I feel I play better when I open with 1.d4

Neither! Go c4

E4 great for beginners as various gambit surrounds it resulting in quick wins and losses lots to learn it's spicy stuff in d4 quite solid revolves round grinding one's positional play understandings ...

I sometimes play 1.C4 too 

1.e4. I played 1.d4 for many years. If you have never played 1.e4, then try it for a bit. If you never play 1.e4, then you are missing out on so many rich and historical openings. 

You will still face 1.d4 when you play Black. So you will still get to play the Black side of the 1.d4 history. The best of both worlds. 

I prefer c4 for its flexibility, versatility and directing the game. I’m a Sicilian player so the Reverse Dragon was natural. I recently just learned the Botvinnik system and having success with it.

With c4, you can transpose into d4 lines or avoid your opponents pet lines like a Frunfeld. For example, I like the Catalan set-up but rarely get that position when I start with d4 because I have revealed my cards from the beginning and of course, my opponents likes to spoil my idea lol.

I would still recommend e4 to beginners because central control and king side play is immensely important.  

In my opinion, Nf3 is the most flexible.

I always start with f4. I don't think many people know the strength of it. Usually, you can quickly follow with g4.

My discount on Nf3/Reti is not starting with a central pawn is a disadvantage. Secondly, some opening set-up prefer a knight on e2.

With that said, were free to open up with anything we like lol 

My go to is e4(Yes, I’m basic)

I made a thread about this topic, which was ignored, except by a rude, worthless troll telling me to quit chess.

e4 hangs a pawn on your very first move. This usually ends up biting me when I open with it. I feel that maybe if you have memorized all the openings and traps, perhaps e4 could be superior. But as me (a ~1000 level player) who hasn't memorized "the essential 100 openings all real chess players must know" it seems to be worse. I also find the early queen attack responses to e4 to be completely insufferable, regardless of whether I fend them off or not. 

I do a lot better with d4. You don't get quite as many moves opened but you're still getting into the center 4 squares without hanging a pawn. So in fact it seems to allow a ton more freedom for the subsequent moves, instead of immediately having to protect the pawn you just hung.

It's unprotected. You know what I'm saying.

Yeah with many FUTURE moves. I'm incredulous that you can be rated 2000 but not grasp how opening e4 makes a pawn that is, literally, unprotected. Perhaps you are so used to your memorized openings that you can't grasp the obvious. "You can protect it with this or that" yet it's currently unprotected. Forcing you into a narrower set of moves to protect it. That was my point. 

I'd also like to mention that the 2 currently highest win-rate openings start with d4. Also AlphaZero moved away from e4 in favor of d4. Maybe there's something to what this 1000 guy is saying after all.

Fundamentally different. Going forth protected or unprotected.

Both are great, but I choose e4 because it is more interesting

E4, or D4 if u prefer, or something else.

The opinion is that u choose whichever one u prefer the most, thats it

I choose 1.e4