I helped several people for Bain Bruxelles, cases tend to be concentrated on profitability, specifically on decline in revenues.
Fit questions are standard; the most common ones include:
- Tell me about yourself
- Why consulting
- Why Bain
- Give me an example when you led a team
- Tell me about a time when you had to convince someone not agreeing with you
- What has been your major achievement so far
- Why should we hire you
In terms of motivation, as mentioned by Serhat and Axel would be great to connect with current consultants and ask about their personal experience.
Hope this helps,