Mary Kay, I don't digitize, but I'd be totally lost without the DP software. I'll confess right here and now that I haven't a clue how to use the built in embroidery function on my 730, because I've always used the software to do all my editing and what not. I've had it since version 3, and I still really have little desire to learn digitizing, but there is still SO much you can do with the software that doesn't involve digitizing.
I love to edit the stitches of purchased designs, some of the fancy fills are just amazing. I also love to combine decorative stitches in the software and embroider them out for perfect results, rather than sew them out on my machine.
Being able to manipulate designs though, is the best. Say you buy a large floral design, but you'd like the bottom 2 leaves removed, and another flower bud added somewhere else. With the software, you can do this. With just the sewing machine, you cannot.
Then of course there's super large designs, which require splitting and multiple hoopings. I've no clue how one might go around doing this without the software, but with it, it's quite easy.
Have you "Tinkled" today?