Pros
great work environment. great gender diversity. great learning experience. great international exposure. great people to work with in serious business environment.
Cons
For Audit/Tax these firms are all very similar. The best way to choose which firm you want to work for is to figure out the culture of the offices in the city you are wanting to work in. The Big 4 have tons of networking events you can go to and meet their team so figuring out which firm you like the best shouldn't be too difficult. Remember that you will be around these people for 80+ hours a week during busy season so it helps a lot if you like your co workers, or can at least tolerate them. Another thing to factor in is their client base in the city you wish to work in. Many clients hire their auditors after they have a few years under their belt, so if one of the Big 4 has clients that are companies you would like to work for then you may want to choose them. I have no consulting experience so i cant really speak to that, but i do know that D&T was the only firm who didn't sell their practice after SOX which has given them a leg up on the other 3