I think this is important. I believe that my husband is on the low energy side of replay as well which leads me to question at times whether it's MLC. I see so many of the symptoms of MLC yet he spends time with his children, does work around the house reports to me (which is more him reporting to himself I believe because I never ask where he's going, who's he with and how long he'll be gone).
With that being said my husband "lives through his mind and can mistake fantasy for reality". It has been this way on a certain level for years but it has become particularly pronounced during MLC. I can hear him glorify the high energy replay behaviors and he has tried some of it out. Going to bars, getting really drunk, interest in cage fighting and such, sadness over never having a close knit group (gang) of guy friends, chewing tobacco. When he does do these things for a short time I can tell they are not working for him and so he'll cycle in and out of phases. He still is clinging to the OW fantasy although I don't specifically know the extent. I have gut feelings that there may be secret phone calls, meet ups and some stuff going on at work. Yet I have know proof of anything just my intuition.
Although his behavior isn't as extreme as others that I have read his passiveness keeps him stuck. I also believe his passiveness resulted in his attraction to a risky "OW" situation. I have joked with him, during his more clear moment,
"couldn't you have picked the single, rich woman with vacation home in Italy? Wouldn't that have worked or made more sense?". Of course, one year later I know there is very little sense in their actions.
Anyway I think this is an important consideration for replay behavior because I know what it's like to live with the "replaying alien" who doesn't act out publicly or to the extreme that is characteristic.