My daughter must run on some wonderful batteries, she's either sleeping or running around. Sleep is an issue, getting her down sometimes takes 1+ hrs, but once she's out she's out until we wake her up. Loud noises in large groups (like weddings) bother her and overwhelm her - she goes into sensory overload. The only solution is to take her out for a break or go home after a shorter stay. The carseat battles started at about 1 yr and continued until she was about 4. Any car rides lasting longer than an hr test her (and us). I've found that a variety of toys and occasional breaks help. She picks out her own clothes - usually soft sweatpants or yoga pants, but there's a brand out there called Soft CLothing for all children (at softclothing.net) that helps those with seam troubles.is always on the go, historically found/finds it difficult to sleep, hates loud noises, hates being strapped in the car, hates clothes, etc
My OT describes SPD as sensory troubles that interfere with daily function and ability to play and learn. We all have preferences and aversions, but when it interferes with normal development, its a reason to be concerned.
PM me if you need more info or want to talk further...