I know this thread is done and dusted, so sorry if I'm interloping and feel free to ignore(I've been busy during the week).
Καλό το autopilot (η προτιμώμενη επιλογή)... (και τα άλλα που μπήκαν στον τίτλο).
Δεν ξέρω αν ταιριάζει και το "impulsively" (for the general sense of the term);
I'm assuming that κεκτημένη ταχύτητα = momentum (ορμή) = an urge (παρόρμηση) to act - i.e, some force (an instinctive urge, etc) is dictating the way we act, as in "force" of habit (perhaps subconsiously,involuntarily once again, but more spontaneously, instinctively c.f."habit" -μια ασυνείδητη δύναμη, που υποκινεί τη συμπεριφορά).
Force of habit is for repeated behaviour (which I know fits in with autopilot).
I'm wondering if impulsive also fits the bill (in the wider sense of the term).
impulsive.
If someone is impulsive, it means that they act on instinct, without thinking decisions through. If you worked for an entire year to save money for a car and then suddenly decided to spend it all on an outfit instead, that would be an impulsive purchase
im·pul·sive (ĭm-pŭl′sĭv)
adj.
1. Inclined to act on impulse rather than thought.
2. Motivated by or resulting from impulse: such impulsive acts as hugging strangers; impulsive generosity.
3. Having force or power to impel or incite; forceful.