always or often? Some names are standard w/ ys... like if it's a -lynn(e) name.
Linn would look strange to most and I don't think of Lynn(e) as trendy... It's more of an old standard. Also, if it's JUST
Alyssa, the y seems more standard than an i, but I agre that in the case of
Alessandra, it just looks like someone's trying to be trendy because the y doesn't even make the same sound as the e does... unless you have an accent that really throws off your vowels.