I love your list!
Maisie - so adorable
Lottie - one of my favorites I love this!
Sadie - also a favorite so cute
Eliza - very quirky but at the same time fashionable - love it
Julie - beautiful name...it was my grandmother's name and I adore it!
Tessa - another beauty....it is my little niece's name
Zoe - so cute and trendy
Hattie - I like this nn, but don't like the full Harriet
Sylvie - love this! It is so french and feminine
Bridget - This sounds a bit old to me....reminds me of Biddy as in Old Biddy
Sofie - very cute - I like it better than Sophia
Molly - another cutie....I love Molly!
Names I think would be best as nicknames for other names
Maisie- Cute nn for Margaret
Lottie- Cute nn for Charlotte
Hattie- I hate the name Harriet, but the nn is okay
Sofie- Something about this looks incomplete. I think this spelling would be a great nn for Sofia. Otherwise it looks fuller spelled Sophie.
Nicknames that should be fine on their own
Sadie- Not many people realize this is a traditional nn for Sarah, so it should be fine
Molly- This is used on its own constantly
Sylvie- Seems fine as a full name.
Tessa- I think this name is full enough. I seem to be in the minority, but I LOVE the name Tessa.
Julie- In 20 years, this will be an old-lady name. Julia, Juliet, Julianne or Juliana are much more timeless.
Other than that...
Eliza- I don't like this name- I think it is just the gorgeous, classic Elizabeth with the -beth chopped off, making it less lovely.
Zoe- This is nice. I love the Z initial :)
Bridget- This name evokes images of Ireland and endless greenery. I like it.
Maisie - sweet, but too cutesy for me. I prefer something like Margaret/Margot, nn Maisie.
Lottie - also too cutesy, but I adore it. I love the idea of Charlotte nn Lola/Lottie.
Sadie - sweet, but for some reason I don't love it. I can't really pinpoint why.
Eliza - love it. I just wish it wasn't getting so mainstream. I loved it when I thought it was obscure, and it's just too loved for me anymore. :(
Julie - sweet, but I much prefer Julia or Juliet, personally. Julie feels a bit dated to me.
Tessa - cute. I prefer just Tess, or Theresa nn Tess, but Tessa is sweet.
Zoe - love it. Love it, love it, love it. It has really sweet sentimental/personal ties for me (one of the first words I learned in the Greek language was 'zoe', which means, of course, life), but I just love its sweet and sprightly sound, too. Plus, I've met this lady (probably late fifties to early sixties) whose name is Zoe and I find it so refreshing on her age group! A lot of people say its too cutesy, but this is one that I don't find to be so. For me I prefer it as a MN but I would love to meet a little Zoe!
Hattie - again, too cutesy for me. I think it makes a cute nn for Harriet/Henrietta/Hadley, though.
Sylvie - while I don't find this too cutesy, I still do prefer Sylvia. It just seems more classic to me.
Bridget - for some reason I can't get behind it, but I do like it. LOVE the nn Bridie.
Sofie - I generally fluctuate between loving Sofia, and Sophia, and Sophie, but for some reason never Sofie. It looks unbalanced to me, but I sort of like it because it seems sorta funky. :) Right now I'm in a Sofia kick, so I'm more inclined to like Sofie than I usually would, I think.
Molly - I wish I could love Molly. It seems to be genuinely liked by a lot of people, but not really overdone. But eh, I know a dog named Molly, but even before that, the first time I heard a baby announcement for a Molly (which is getting close to 20 years ago, when I was still a kid), I instantly disliked it and it's never really improved upon me. It is sweet, and I like Holly and Lolly, but I'm not really a Molly person, sorry. I can appreciate Amalia nn Molly, though.