Born in 81 and I feel the same. I think the date range used to classify Millennials is too wide, and there's a dramatic difference in experience between those born in the early '80s and those born in the early-mid '90s. Someone born in '95 would likely have had a completely different childhood to someone born in 1980.
Whereas I was born at the end of 81, and couldn't be more Millennial. I feel like people in their late 20s/early 30s are my people, while most other 35-and-older folk are too Gen Xey for me to click with. I have a totally different value set and worldview to them. To really boil it down, they're typically more cynical and pessimistic, less progressive, and less empathetic towards the less fortunate members of society. Way more progressive and empathetic than the Boomers, but less so than Millennials.
Edit:
I think the defining factor is the expectations Millennials were raised with. We were told if we jumped through hoops A, B, and C; we would get rewarded with life Z. This is why so many Millennials are accused of being "entitled". We were told we would be if we held up our end of the bargain (school, university, work experience, etc), which many of us did, only to find the certainties we were raised to belive in, and which motivated us through our teens and early twenties, weren't certainties at all. Despite what we were told, there are no guarantees in life. But crucially, we believe that there probably should be. Millennials typically feel that
everyone is entitled to an awesome life; and have much more empathy for the impoverished because we know their economic circumstances aren't their fault.
I think we were also educated more comprehensively about issues of race and gender. I just got the tail-end of that, but not being triggered by words like triggered, and
totally being triggered by words like triggered is a huge ideological difference between me and the Gen Xers in my life.
These things are much more significant factors in how I relate to others than the fact that I can remember life pre-internet.