The basic options are chocolate, vanilla, red velvet or carrot cake. However you are not limited to these four options.
If you are a sugar lover American buttercream will be perfect for you. Alternatively you can consider Swiss meringue buttercream, whipped cream, cream cheese etc. Keep in mind that flavoring is added to the filling and the flavor possibilities are endless - think of caramel, coffee, hazelnut, bubblegum etc.
The amount of people will determine the size of your cake. Refer to my sizing guide below.
The outside of the cake can be covered in buttercream, fondant, cream cheese icing, whipped cream etc. You can also consider the naked cake or semi-naked look with fresh/edible or plastic flowers or even fruit. The covering should of course match with the them of the event. If you have any pictures of what you have in mind please send it through to me.
The time of year could also have an impact on the type of filling and covering that can be used. Also whether the cake will be served indoors or outside.
Simple one tier cakes can easily be collected from me or I could bring it to you. However, larger and more complex cakes are a bit more tricky to transport and I suggest making use of my delivery and setup services.