I've built only one fly rod, couple spinning rods, and one ice rod.
WRT the fly rod....All of my other fly rods (purchased) have snake guides, my home built fly rod was built with single foot Fuji alconite insert guides = way faster/easier casting. Now that I know the difference, I would never use snake guides on a fly rod unless I was trying to keep the budget down as there is night/day difference in casting/smoothness IMO. Single foot guides supposedly bring the weight down but if you can get single footers with inserts, it's even better. Get ceramics in ALL guides, not just the strippers.
My build was 8' 4wt, MHX blank (4 piece).