I use CIMB for its big ATM network. Most Petronas stations have their ATM and I drive a lot so that's very convenient.

I use OCBC's 360 account for its high interest rate of 4.1%. FD level interest without any lock in of funds. Just that have to do three things monthly, deposit RM500, pay three bills via internet banking and swipe RM500 cumulative on their credit or debit card.

I use Standard Chartered JustOne current cum savings accounts for being able to use cheques without account fees.