Wedding cake

If you're just going for one flavour, then I'd probably stick to plain vanilla since that's the one that is likely to be most widely accepted.

However, it should be possible to have two or more flavours in different tiers/cakes. Most weddings I've been to where they have had different flavours, the staff bring round trays with a choice on, and people pick what they want off the tray.

Honestly, it depends. Are you going to be taking photos cutting into the cake? Will the cake be on display at all? If the cake is just going to be at the back, go for sheet cakes in different flavours. You can have a small cake at the front where you and your partner can cut into and then for all the guests at the back will be sheet cakes. It is usually way cheaper than having a tiered cake.

For flavours go for the classics and most popular flavours like vanilla, red velvet, chocolate, carrot cake. Some other popular flavours are chocolate cake with oreo filling, chocolate/vanilla cake with salted caramel and lemon. It all depends on what you and your fiance like to eat.