well another theme we were discussing was the father thing. everybody has ajor issues with their dad. locke, sawyer, kate, jack, (charlie and hurley apparently dont have one) but this episode gave insight into sayid's past and he has daddy issues too. the interrogator guy says about his dad was a proud war hero who sayid wouldn't dissapoint. more daddy problems in the mind.
yeah, this is something i've noticed too. one of the episodes was even called "all the best cowboys have daddy issues." that's definitely a strong theme.