LOL, that is roughly the equivalent to "which motor oil is best" on a car site - EVERYONE will have an opinion, and usually opposite to the last! 2 schools of thought - one is all chain - that gives you the most strength, the most weight on the bottom, the most long lasting - but there are some downsides - weight on the boat, noise on the bottom, overall handling. The other is the 1/2 and 1/2 that you mentioned - or most likely - 1/4, 3/4 - at the bare minimum it's usually at least the boat length of chain, and then the rest rode. Whichever method you go with, for general anchoring conditions around here, 150' is the standard, and as per usual, more is better - guaranteed that whatever length you pick, one day it's be ugly conditions, deep and you'll want 20' more than you have. On our larger sailboat I've got 150' of chain, spliced to 150 of braid - and about 90% of the time I only use the chain portion. If you go with mixed chain and rode you will need a splice that will go through the windlass gypsy - several will work but the standard backplice (if 3 strand) is the most common and easiest to do. And it goes without saying that the splice condition should be checked often and re-done if showing any wear.