If you are going to use an animation completely instead of any /me's, you will be missing some emotions or signs that you normally would see. Someone sitting on the edge of a chair, someone being more laid back or perhaps someone who sits straight up instead of slouched down. Everyone is able to conclude someone's behavior of those actions. This is one of the reasons why I will always use /me's over animations or combine them. I pretty much roleplay anything from getting in a car to putting on my seatbelt or turning off the lights while others might just press the action buttons. I think this all comes down to whatever someone's prefer.