Birthday cake take one!

Decisions decisions! which cake, how big, how small, what size, what colour, which theme?!! So many choices.
I knew I wanted to make it myself but which I was unsure or a while.
I thought I would try the rainbow cake, which I tried to make this evening with slight changes to the recipe I was using.
It was supposed to be a 10 egg cake and made into 6 tiers. Maybe a bit on the big side for what we needed, besides i only had four different colours to add in! So i made it with 8 eggs and then followed our normal cake mix recipe (weigh all the eggs, then add everything else at that weight as well i.e. if all eggs weighed 10oz then I would add 10oz SR Flour, 10oz sugar and 10oz stork)

I split the mix into 4 even portions and then added the food gel colouring, and cooked for 20 odd minutes and let it cool. Once cooled i made a butter icing mix and spread it between each layer and a small outer covering to begin with, once set I added a proper butter icing covering.

It didn't look too bad i must admit, but it was huge! and heavy.
I tried it but unfortunately it was very heavy, I'm thinking I didn't mix it for long enough, but if anything it's almost convinced me that it wont be the cake for your birthday.

Which leaves me back at the beginning! What cake do I make?!