Actually, fine tuning a Ruger 10/22 is my current project that I'm really getting into (read: probably going over board).
I switched to a Houge over molded rubber stock, a Green Mountain bull barrel and a Volquartsen trigger group. It's still a work in progress but by far the trigger set-up will make or break the project.
Another parts switch worth the money is installing an extended mag release. Why Ruger hasn't copied or bought out any rights to it is beyond me.
If the bolt release bugs you as much as it does
me and practically every other 10/22 owner, you can save yourself a few bucks by simply filing out the little hook where the ejector retaining pin passes through.
My next step is to bed it properly, scope it and find out what ammo it like best.
I know your question was originally about triggers, but you hit on something I could babble on about.