Here's my take on the alphabets. I have 3 full sets and like them each for different reasons.
1) Shadow - these are really fun, it's like getting 2 sets in one, and you can make themed titles by cutting water words out of water paper, etc. It's a bigger letter and sometimes large titles don't fit well on even a 12 x 12 page.
2) Fun Serif - I like that you can do upper and lower with this set and I also like the look. It's also a larger letter and can sometimes be too big.
3) Lollipop - to me the best since it fits on most pages and you can use it alot without it looking all the same. The only drawback is it's uppercase only, but has not been a problem.
My daughter is 6 and she prefers the shadow, but seems to use the lollipop more since it fits her pages better. Hope this helps.
Lisa