I didnt really get on with sleep suits - all thoses damn poppers in the middle of the night!
At night, I much prefered the old fashioned long nighties with elasticated bottoms. They can be quite hard to find but JL normally have them. Most of mine were passed down & originally sent from the US or bought in Gap (but I havent seen them sold in there for years)
DS1 was very curly and used to end up bunched up inside the sleep suit with the legs just dangling.
Ditto with one piece "day" outfits, so he tended to be dressed in leggings/trousers & then long sleeve tshirt or long sleeve vest worn over a short sleeve vest if cold.
DS2 was born in a heatwave so only wore nappy & vest for first 3 months of his life lol
I always looked for bottoms with feet whilst they were little as even the supposedly fab Gap socks do.not.stay.on little feet.
My DM had a thing about teaching baby "night from day" which I kinda went with, so I always put my two into outfits in the day & sleepsuits/nighties at night.
However I like babies to look like babies so no denim/shoes, they were always in soft leggings/trousers/tights (when I could find boy colour tights) and tops or DS2 wore all-in-ones, all with no or very little fastenings. (You see so many newborn clothes with fastenings on the back - why? surely it would be uncomfortable to lay on a row of buttons all day?)
Tights are great for boy babies - mine wore them as trousers when very little and then under their trousers in cold weather till potty trained. no lost socks! (it is just difficult to find boy friendly ones)