There have been many regrets I have... Some of sins, choices I've made, people I've hurt.... but I have Never, NEVER regretted going to church, praying, reading the scriptures or other goodly activities as these.
Over the past few years, I have had many cross roads. Things i could have done that have presented themselves time and time again, and those times i followed gospel teaching in these choices, I do not regret.
I read somewhere that "Living as Jesus taught brings no regrets"