Fathers complained of the frills on boy babies. I heard this from southern and northern Ohio areas. One group in NW Ohio is making gowns from wedding gowns and they were told to make them more boyish. Would you believe someone put dark brown large rick rack on the gown. Bet that one ended in the trash. Ugliest thing I ever heard of. I saw one preemie group that asked for duplicate items, one that goes with the baby and one stays with the mother. Don't know how many do that type of thing. If you do a web search for preemie burial organizations, you will find many and just look through their requirements. You don't want to go through a lot of work and then it isn't what they want. I have not made any from flannel myself but if I had to buy flannel for that type of garment, it would definitely be a good flannel, not Joann's stuff. Those outfits take such a small amount, so paying a bit more per yard isn't going to break the bank. One group said any lavender, peach, or pinks and it is for a girl. So I think blues, green, yellow would be best to trim on a boy and the more delicate in color the better. I hear you about boy designs. I look and look for boy fabric for sleepers and it is impossible. Have given up, just buy plain colors and put an embroidery design or applique on them. Hope I answered you questions but again, take a look on the web and just gather information from these groups that deal with this issue.
Carol NW Ohio