Most Helpful Guy
Profile for sure. Things that could be instant dealbreakers should be presented up front as much as possible.
This will protect you as much as it will protect the guys. A guy who has a couple of successful dates with you, and starts thinking you are really great, and then finds that out and it's a dealbreaker... they're going to be pissed.
And it will work in the reverse. You go on a few dates with a guy. Think he's really great. Start getting a big crush going on. And then you tell him, and he leaves. And then you feel like shit.
Weed that out first. Save him the annoyance. Save yourself the potential disappointment. Just be up front. Those that are down with it will still ask you out. Those that are not will be able to steer clear and avoid the inevitable let-down.
Most Helpful Girl
definitely not in your profile!!! After they take you out on few dates and you guys hit it off. Tell him as succinctly as possible that he won't be getting any unless he puts a ring on it.