Among the types of 'reincarnators/regressors becoming actors' genre, this is an interesting take on it. At least concerning the abilities.
MC has access (somewhat) to all the abilities from his past lives which seem to number in the millions. His abilities start off weak but have the possibility to get stronger as he grows.
His character is of the standard nice guy aiming for one goal. He doesn't want to hurt anyone and just wants to live in harmony with all his family, friends and workers from various forms of media. Since this is very 'slice of life' and he's a child, this is very easy to do. It'll be interesting to see what happens when he becomes a teen/adult. Can't stay innocent forever. We do get some depth to a few past lives that show both good and evil aspects of him. But at a certain point they stop showing those and its a shame, really.
The other characters around him like family and friends are very 2D. They love him or admire him but all support him. His mother's brother is the only one we are given a peek about their struggle in life to reach where he is. But even that tiny peek is very short and easy to forget. It's a very cookie cutter type world.
Story wise, it's very simple and nice. You watch him apply his abilities to a role he takes on, everyone is amazed. He gains in popularity, rinse and repeat. So far he has been taking on different forms of acting, but it's all the same core of him using abilities to make it work out. He'll do something on the side that may or may not get much story time that will help him grow to use the abilities better but that doesn't happen often. Apparently he's practically perfect as is and everyone aspires to be like him or around him to learn.
Over all, a great slice of life with fantasy elements tossed around here and there.