Dock line for home port then 3 strand is great. I cleat em semi permanent at the pier or piling and adjust at the boat, fish em in with a boat hook. I have 5/8 Sampson (40') for big blows, away from the boat a long time to double up with. When cruising I keep the big Sampson aboard. Home port, strong but cheap is good so 3 strand is fine.
For cruising I am acquiring 1/2" 8 plait (brait) by Yale. 8500 +- breaking strength in 50' lengths. 4 or 5 coils. The stuff is flexible, does not twist up, does not have a memory and is soft and easy to work with. Throws good also. No eye splices at all. If I need a loop then quick bowline but otherwise bitter end. Ends finished with heat shrink and melted, no elaborate whipping.
My boat loaded is 32-35,000 loaded, I have seen this on 42,000 lb Great Harbor looper and it works great for them. I am sold. Defender $.96 afoot. Little pricey but the best solution I have seen.
Another thing I am adding is a proper heaving line, 60' with a monkey fist, perhaps, most likely, out of 3/8' 8 plait.
My anchor rode is 250' of 5/8 8plait behind 75' chain. My nylon NEVER tangles, just piles up in the locker.