GUYS: What would you think if your gf you're taking a "break" from contacted you?

Let's say you initiated the break after weeks of flip-flopping because you care about her so much.. You're just simply very stressed/have a lot going on & not sure the relationship will work out long-term (after being together several months or close to year).. there's a possibility you see it starting again. If she called a few days later (at least 5+) sounded upbeat (compared to the negative/depressed person she was near the end of the relationship which you found unattractive & it started to pull you away).. She sounds like the fun, positive person you first met. And she'd ask about what you're up to.. Would that spark your interest if you had feelings for her at all & wonder how she's doing (whether or not you pick up when she leaves a voicemail)? When she makes you laugh & have a normal convo (NOT about the relationship you had), would you start to miss her a bit? Would like to hear guy's thoughts on this.. We're talking if the girl is NOT being desperate/pleading about the relationship.. just contacting you to get back in your life (and eventually probably try to revisit the relationship). Basically, I'm contemplating if / when to call my ex who needed a "break." I will not give it much time though. I've been reading some relationship advice articles & generally everyone seems to say that if you call/text it should be casual to work your way back into their life.. make it sound platonic, make them laugh, remember you as the person they fell in love with. Unless the break up was because of something bad like cheating, does this tactic work on you, guys? If you love her at all, is it fairly easy for her to creep back into your heart & second guess yourself..."what if?" Be honest! You're anonymous & i know guys have feelings, too!! And when she calls obviously has to do it soon enough in a window of time before the guy tries to move on or umes she's moved on, dating others etc. Thx for input, guys! Appreciate it!!