This was my first live ISC experience and I had a lot of fun solving all the puzzles, noting down few that stuck out here:

Round 1: Classic 7 and overlapping flowed really nicely
Round 2: Trio Sudoku, Sum Next to N, Sudokurve were ones I enjoyed more
Round 3: Loved diagonal, Sum Next to 9 & Renban Sudoku here
Round 4: Did all the set 2 puzzles here, a lot simpler to deduce than set 1

On a side note, I did solve both the playoffs and the gift puzzle by clover, a lot of fun (though the gift puzzle took me a while to solve). Thanks to the organizers, puzzle setters and the general community for such an engaging event!