Takeout. I get it a few times a week and always feel a bit guilty about it. I like supporting the local businesses but it's expensive and the plastic containers aren't great.
I can easily afford it, so it's not like I'm gambling away my family's savings or something. However... At $10-20 a pop they aren't so "micro" anymore. And I know it's bad that I'm encouraging this predatory tactic. The money probably doesn't even make it to the developers. But they're freakin' ships from Star Trek! I can't help myself.
Not the products themselves, but the amount of packaging to throw away every time I buy a new chair or shelving unit that comes wrapped in layers of foam and plastic. Makes me guilty how much waste there is. But buying second hand isn’t always an option.
I actually feel really guilty about buying all those single serving drinks from Dunkin' and the convenience stores because of all of the plastic I am just putting back into the environment. I really need to stop doing this. 😾
Gasoline. Airplane tickets. Those are probably the worst two things. But as others have said there are really only a few things that don’t make me feel guilty. So it might be easier to list those.
Things I want but don't need like a beer at the store on Friday evening or a tablet of chocolate for the weekend or a game on Steam. So I try to minimize such purchases.
I spend like 200 per year on lottery tickets. I know that the odds of ever winning big are close to zero, but it's like a guilty pleasure that let's me dream a bit. Like a cheaper movie ticket.