13 times in the early 90's like @NothingIsWrong at anti road protests.
Initial arrests for various, breach of the peace, criminal damage, assault, resisting arrest etc.
Wasn't ever actually charged with anything more serious than behaviour likely to cause a breach of the peace though.
The arrests themselves were sometimes a bit scary but I knew the position I was putting myself in and was studiously non violent (but uncooperative) and did get a bit of a kicking a few times.
Once back at the station it was generally fine, I had nothing against the police for doing their job and it was mostly amicable and sometimes they were interested in the background and reason for protests.
I did learn to try and not get arrested on a Friday though because 3 days in a holding cell is a looong time.
Having enhanced DBS checks later in life did lead to some interesting conversations with headmasters when I worked with vulnerable children but was never refused a job for that reason.
I was told by a barrister that I was unlikely to get a visa for the US though so I guess the orange Comb-over-in-Chief will have to manage without my talents 