The first one.
Welcome to the Quilting Board!

#1
Number 2....but....have you looked at any of the "Affairs of the Heart" blocks posted on QB at various times?....some great inspiration there, any could be somewhat simplified.
I like #2, because I like the scrappy look.
If you took block #1 in shades of green, add a stem it would work as a shamrock for St. Patrick's day.
I like 1 and 2, but I like the second one best, with the different fabrics on a 15.5 block, because it offers more variety. The first one looks like a red shamrock to me, but of course that may be what you are looking for. Whatever you do it can't help but be pretty!