We need more actual petty reasons in this thread. Here are 10 of them:
1) I am not going to buy 5e because I hate art, and I heard many pages will have art on them. Art is just wasted space that could be filled with crunchy text, and it means I am paying much more per page than I should be paying if it were not filled with that useless empty space with art in it.
2) I am not going to buy 5e because I have another edition of D&D that is my favorite and it doesn't duplicate that edition exactly.
3) I am not going to buy 5e because there is one rule I don't like. I like 99.99% of the edition, but that one single rule, which will not come up that often anyway, is enough to get me to not buy the edition.
4) I am not going to buy 5e because it has an optional mechanic I don't like in it. Now, it's optional, so I know I don't even have to include it in my games - but the thought I would be supporting a game that includes players somewhere out there using that mechanic which I hate is enough to push me over the edge to not buy the game.
5) I am not going to buy 5e because, though it looks like a game I would love, I hate the company making it because I didn't like a prior edition of theirs.
6) I am not going to buy 5e because, though it looks like a game I would love, I don't like someone else who likes it, and I don't want to associate with a game that includes a player like that.
7) I am not going to buy 5e because, though it looks like a game I would love, they are not releasing it under the electronic tools that exist for a prior version of the game, and I really wanted access to two different versions of D&D for the price of one, at no extra charge for the new edition.
8) I am not going to buy 5e because I am loyal to another version of the game or another company with an OGL version of the game, even though I probably would like 5e better. Because my loyalty to a company or prior version is more important than increasing my enjoyment of my hobby.
9) I am not going to buy 5e, even though I think it looks like a game I would love, because I think the price is too high. I can easily afford it, and I know I can buy it at discount for a price that is roughly in line with other discounted games I've bought, and I have no decent local store anyway to be loyal to, but I am not going to buy this game I think I'd really like because of the principal of the thing. Even though probably nobody will ever notice my principal, or really understand what principal is at stake.
10) I am not going to buy 5e because, even though it looks like a game I would love, I don't like one of the authors of the game. Because he once said something I really don't like, and I took it personal.