im torn between animating with 3 different techniques

so should i animate the traditional way with just drawing keyframes for my stickfigures(and make only cars and so on with classic tweens), or the modern way by converting each bodypart into a symbol, seperating it on layers and creating classic tweens, or using the bone/rigging tool? That one i didnt try much out but currently i use the modern approach. What do you think is best?