From the AIM:
A visual approach is not an IAP and therefore has no missed approach segment. If a go around is necessary for any reason, aircraft operating at controlled airports will be issued an appropriate advisory/clearance/instruction by the tower. At uncontrolled airports, aircraft are expected to remain clear of clouds and complete a landing as soon as possible. If a landing cannot be accomplished, the aircraft is expected to remain clear of clouds and contact ATC as soon as possible for further clearance. Separation from other IFR aircraft will be maintained under these circumstances.
IOW, if you accept the visual, I think this all means
(1) there is no applicable missed approach procedure. Period. You don't get to make one up or select one from a different approach because you like it. That makes sense since you in radar environment you are not likely to get the published missed anyway and the published missed you decide on your own to use choose may well interfere wit other traffic.
(2) you are effectively saying you can maintain visual conditions for the approach and any need to abort the landing, at least until you inform ATC (easier when the airport is towered) that you have gone missed.
(3) The non-towered airport situation is the dicier one. Towered, the discussion with ATC takes place immediately. Non-towered, if for some reason the weather is an issue, you may have a problem on your hands. Of course, If you don't think you can maintain visual conditions for the approach and the early part of going missed, I think the solution is, don't accept the visual in the first place.