details on the returning hostages from media reports so far:
hamas have attempted to fatten the hostages over the last few days, despite israel's request not to do so as to prevent refeeding syndrome (which can be deadly)
none of the hostages require emergency care, but physical recovery might be very long for some of them
avinatan or was held completely alone (without any other hostages) the whole 2 years in captivity. due to his isolation, he knows very little of what happened since 7/10. he was kept in terrible conditions and was starved by his captors. he's very weak and thin, and lost 30-40% of his body weight.
elkana bohbot saw his family fight for him in protests and on the media when he was allowed to watch tv. he was held exclusively in tunnels for the whole two years, and lost his sense of time. most of the time he was in chains. one time, when he realized it's his wedding day, he begged his captors to let him wash himself as celebration, which they eventually relented to. he's suffering from stomach pains due to recent overfeeding, as well as pains in his arms, legs, and lower back
matan angrest underwent horrible torture in the first months of captivity, and was kept alone for a long time, and wasn't allowed to even relieve himself for days on end. he made up his mind to never surrender to his captors and the thought of his family kept him going. he's suffering from damaged sight, partial memory loss, flashbacks, and sometimes consciousness loss. his hand and fingers were injured and severely burnt, and were treated without anesthetics, which only worsened his situation.
evyatar david is very thin and weak. he was starved even after his famous "grave digging" video and underwent physical and psychological abuse, which was harder for him than the lack of food and water. he was overfed near his release, but realized what was happening and tried to ration his portions.
alon ohel suffers from shrapnel wounds in his torso, and headaches. his wounded eye is undergoing tests to see if his sight can be saved. there's a piano in his hospital room, and he's already played it. when it was announced that idf intended to recapture gaza city, hamas deliberately transferred alon into the city.
gali and ziv berman were disconnected from the outer world for long stretches of time. they were held separately, but in the same general area. they were often starved, but there were times when more food was given to them. some of their captors spoke hebrew with them (unlike the other hostages, who learned arabic in captivity).
ariel cunio was kept alone for two years, which resulted in much uncertainty for his wellbeing. david cunio was kept with eitan horn and nimrod cohen, in several tunnels (except for the short time he was allowed to stay with yarden bibas, per yarden's request, after the murders of his wife and kids). for a long time, david didn't know if his twin brother, eitan, survived 7/10 - the last text he got from eitan was "i'm burning" (his house was set aflame).
omri miran counted the days in captivity and the number of places he was held in (23), so he always knew what date it was. he was held both in tunnels and above ground. he would play cards with his captors and cooked for them - they loved his cooking. once when a deal fell through, his captors were pissed at hamas for not taking israel's offer.
maxim herkin lost 30kg off his weight and suffers from injuries and issues with his jaw.
eitan horn lost 60kg off his weight.