I have been carrying an LC9 every day this summer. Part of that was a trip to Exeter my SigP220 was taking for a minor refurb. Honestly, it will be tough to swap back. The Ruger is so much lighter and slimmer that it will probably continue summer duty.
All that being said, it's unlikely to become a range favorite due to a LONG and pretty stiff trigger pull. Practice will help with that, but won't be the most fun you'll have at the range.
The main issue for me was the superiority of the 9mm over the .380 as a SD round. I wouldn't carry a .380, but that's a can of worms I wouldn't argue about with someone. You are the one whose life is being protected, by your own hand, so you have to make the decision about caliber.
I'm not fond of the redundant thumb safety, so I don't use it. The other features such as a magazine lock and the loaded chamber indicator were pointed out to me as allowing sale in the more gun-unfriendly states, such as California, but that is hearsay.
I hope some of this rambling might assist you in making a decision. My best suggestion is to get to a gun shop and handle both the LCP and the LC9 and make that decision about which round you rather carry versus size.