When I think "acts of service" it reminds me of 2 separate ISFJs (who don't really know each other at all) who took time to clean someone's oven as a show of love. In one case, it was a daughter who routinely does this for her mom when she visits. In another, it was a guy trying to win the affection of another guy. Personally, I didn't get this myself, as in acts of service are not really how I primarily show love. I would be more likely to pick up sweets or snacks that I know someone likes and are hard to get or agree to go to some show or event that I don't really want to go to. I remember an INFP I dated I think showed love this way too, but often would not necessarily state "this is a pain in the ass for me, but I'm doing it for you because I like you". I think this led to the problem later of her feeling like I was unappreciative, but honestly, I didn't know she was doing any of this stuff 'out of love'.
My results:
8 Words of Affirmation
9 Quality Time
2 Receiving Gifts
6 Acts of Service
5 Physical Touch
Funny thing is, "GIVING gifts" is a big one of mine to show life/affection/etc. Maybe it's Ne but if I see something and it reminds me of someone or I know "they'd love it" I want to buy it and give it. Not big expensive gives, but thoughtful, heck "cute" gifts that will be appreciated and will resonate with that person. Physical touch from friends and family is not so needed, but absolutely from a partner. I guess all my physical touch needs are fulfilled by a partner...and pets.

And yes, I do acts of service for others too. I see those more as a duty thing and those things don't/shouldn't call attention/require thanks. It's my Asian upbringing.
Quality Time to me is giving the best of yourself fully to someone/some people/a period in time. It is the way I primarily enjoy showing and being shown loyalty, commitment, and affection from friends and lovers. Along with 'words of affirmation'. I guess I assumed that was most people though, as "hanging out" and "chatting" are the two main ways people become friends and lovers??
so/sx