Hi Maarten
A good question,I think it is because I just like tinkering with kits.I do get great pleasure from it,different problems to be solved than those with scratchbuilding.I do tend to look at kits and see beyond the box art and think "Hey I can do something special with that".Possibly why I have chosen kits that fall short in some areas,but can be made into something better with a little thought,a few materials and a little extra time.
I think possibly the reason why I have never built Caldercraft's Victory.The kit is SO complete out of the box and to make something that is an individual build,I would spend the same cost of the kit again on timber,trashing so much that is provided,it wouldn't be worth it.
I bought Santa Ana on such a basis,I had a vision of how I wanted the model to look and to get there I wouldn't be throwing half the kit in the bin.I learned my lesson with Sovereign,this ended up virtually full scratch as the partwork was so different than advertised.I will make use of Veneers to great extent on this build,on Royal Caroline I used full thickness Pear planks and solid Ebony,I spent nearly double the cost of the kit just in new wood!
Kind Regards
Nigel