Bottom is just a common working "Joe" who thinks this may be his opportunity for the big-time. He believes that an excellent play put together by his fellow tradesmen may lead to some favor in the eyes of the wealthy noblemen. This, of course, leads to his enthusiasm in playing everyone's parts and eventually leads to some excessive overacting and even a song and dance on the wedding night. Definitely a lovable character. We laugh at him, but most of the audience would be able to see the angle he's working.
Bottom, is a leader of a troupe of clowns of a ragtag group of "actors" (term loosely used) bent on putting on a play. He is boisterous and comically serious, directing his players with the utmost sincerity but appears as ridiculous.
It is fitting that the fairy, Puck, turns him into an ass. His behavior is often asinine.
Bottom is often comic in his own failure to either lead or realize what an "ass" he is. Even when Puck's mischief has ended, Bottom is still the butt of the joke. For example, after he has been freed of his ears and tail, he wonders aloud:
"I have had a most / rare vision. I have had a dream, past the wit of / man to say what dream it was. Man is but an ass, / if he go about to expound this dream" (IV.i.204-07).
Still, even if he is ridiculous, he's a winning personality. He is full of humor and word play, and completely without malice.
He is a conceited mechanic havin the significance of collision between mortals' world n that of the fairies.He bosses ppl around.Yet he always comes up with creative ideas.
Under effect of Puck's magical trick,he transforms into a more considerate,graceful but bossy ass.
We can't say he's a fool.But he is a 'dreamer' who adds joy and ridicule to the play.