I grew up with a stepdad and didn't have a strong relationship with my dad until i started college. If it wasn't for my stepdad I would have grown up with no male figure in my life. I understand where you are coming from, but you are missing out on some amazing ladies and a chance to change/be a childs life.
Eh, like I said, if I were all ready a dad, or had at least all ready had sex, I might consider that. However anything besides a chaste woman for me be being un-equally yoked, I wouldn't be happy, and I'd just be better off being single, and I am content to go to the nethers as a virgin if that be how my life's journey plays out.
Also you have to understand, I grew up with both my parents, and despite his flaws I respect my dad greatly. Now their marriage wasn't without their flaws no doubt about that, and I don't want to be the exact same as my dad (cause he was a bar hopper for years and I saw how that affect my mom negatively), but I know that if they had gotten divorced while I was a kid (and this nearly happened once) and my mom started seeing another guy, I couldn't accept him, that's all there is to it. I'd like to think now that I'm older if such a thing occured that I'd be okay with it, but that just be dishonest to myself. Luckily my parents are probably both too old and too crazy to really be with anyone else lol. Perhaps this is somewhat different for guys than it is for girls.
I am glad for your sake that you did have a good step dad. I know most my friends' parents are either single parents or divorcees, so I have seen the different dynamics of such relationships. In some cases the friend actually likes the step parent better than their biological parent (usually for a reason similar to yours where they don't really know their biolgoical parent very well.) Yet in others, particularly in the case where the parents were divorced when the kid was at an age to be concious of their surroundings they have a similar view as mine.