The first one.
Welcome to the Quilting Board!
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!