I got into Zelda with the first tiel at it's original release, and my interest stemmed from there. So, because I grew up with the series, I really experienced each version of the zeries as they came out. I never had to backrack on the technology like some who got into the series with the 3D titles.
Because of this, I'm open to any of the various forms of the series. I don't think I have a favourite style or flock to one type over the other. I don't tend to frequently revisit titles as I've seen some people do here. For instance, I've only ever played through OoT once completely.
So, while I really don't have a certain era I flock to that often, I do seem to enjoy what I'm playing at the time the most. This is the case for game series' as well. That is to say while I'm replaying 8-bit titles, they will be my favourite. As I was playing TP for the first time, it was my favourite.
I guess this post really is to say "I don't know" in a way, but it really does show my mixed up attitude towards the series in it's many incarnations. I suppose the simple answer would be "All of them, all the time!"