Why yes I have a personal portfolio... it's called the courthouse. 😎
paper copies? no. but i have 10 years worth of stuff in PDF on various hard drives and back-ups.
and there's always the county clerks' websites around here- i could quickly dial up dozens of plats with my name on them if needed.
No and yes, since the files are mine anyway. I'm not putting any to the side for a portfolio. There are thousands of my drawings on the interweb anyway. If anyone wants to see them.
I have only two drawings that I've personally hung on to and they rest in a drawing tube in the corner of my home office. It's a boundary survey and topo I did of my property I surveyed and drew while a starving college student using borrowed school equipment and computers/software. At the time I considered it nothing short of a miracle that I could survey, draft up the boundary and create a tin with 1' contours and breaklines from what I was learning in class. Not my prettiest work, but I did it for my best client. Now there's a recorders site and a dedicated file room chock full of my drawings and not a one of them means as much to me.
For the last 22+ years I've owned my own shop and have all of my files. Even with that, I have a stack of easements and drawings I prepared while at my former employer. While there I did boat load of utility easements and cell tower sites, back in the beginning of the craze. Amazingly I still refer to them on occasions. If I was smart I'd scan the ones unusual ones for easier reference in trash the rest. It would free up a shelf in my only remaining book case.