I got a 3 character pattern for the first puzzle and a 4 character pattern for the second puzzle (and reading a comment here I see there is a 2 char pattern for the second puzzle).

Only used 1 special char between them (anchoring something). So the first two sets have repeated 3 character sequences, and in one of them they follow an additional pattern.

For the third sequence, 8 character solution, lots of specials.