Any feeling type with Se. The responses have been really interesting. I think Si users could look kinda boring or pushovers from the Se-point of view. Well here is an aspect of personality that I didn't even NOTICE till my 3rd decade of life... that some people actually have Se and have an Se vibe. Seriously tertiary Si is like living head under the ground (picture an ostrich).
It's true. Introverts with Si are more likely to "look" like push overs bc they don't give off the Se room vibe. And yes Si doms are the most likely to fit your ostrich description, though I would see it more like goggles full of water with a goldfish swimming in front of their face...one of the most intelligent Si doms I have ever known was my grandfather and still he was so closed minded about xyz it was about as productive to try to get him to see it as screaming at a wall. Another very intelligent Si dom I was close to who also had a lot of Fi was deeply aware of the goggles, he showed me pictures one time that were Si to him...one was of a model that looked vaguely 80s in style and was probably his type (slim, brunette) ...then a panel again beside it of the same exact photo, looking wavy and distorted. Yeah...that's Si.
I've noticed most in my late twenties and thirties that some people I went to high school with kind of listen to the same music they did when Kurt Cobain died (just an example) and are completely unaware of what goes on culturally though they have spouses, children, full normal lives, it's something that actually creeped me out at first, like omg they seem old and stuck in the past and we are around the same age (some are a few years older, etc)- and they are not literally stuck in the past, they have lives, it just seemed odd to me that they built a solid life on the same construct. There's nothing wrong with them, they achieve this or that which I haven't, but what ...frightened me I guess was that aesthetically they were grounded in a fifteen to twenty year old meme, and maybe that's Se looking at Si, because it's really "insignificant" I guess but a marked difference in our structures of our lives...and my friends with Se who are still there or even have families still kind of experiment with things like.my ISTP guy bff from hs and his ENFJ wife...they still seem with it. I sound like an asshole but I have a point about perception.
Also note though that ESxJ types can use Ne to balance the Si and the Je makes them seem lot less push over. My ESFJ ex used to call himself a throw back, but his Ne I guess kept him expanding on his Si meme aesthetically. I also think of course the actual new information accessible to an Si type keeps them fresher and makes them different, when they travel or live in major cities.