Nice look'n sticks dubhelix!
Some of my sticks are smoother (weaker) than others and this is due to the blend. I have some all Seco filler sticks and some all Ligero sticks. The all Ligero filler sticks smoke stronger. I also use either a Maduro or Criollo 98 wrapper. I have smoked a Don Pepin Garcia and feel that my handrolls are similar in taste. I have never tried Small Stalk Black Mammoth or Yellow Twist Bud, but I'm assuming they are lighter leaves and may be the reason for the weaker taste. As DGBAMA states in his post, Don's leaf makes some good taste'n smokes. By adding his leaf with yours, should bring up the flavor.
Are these tobaccos that you have grown yourself? Keep in mind that they say the "real cigars" are rolled and aged before distribution. I know some of my handrolled that have been sitting in the humidor for a few months, are a little more flavorful than when smoked right after rolling.
Either way, congrats on your first two. If you are like me, there are many more to come. Keep blending, keep rolling and you'll find that you like yours better than those "real cigars". I know I do!!