Every guitar has a neck, with a frett board, there are many styles, and such.
Which one is your favourite?
How do they help you play more comfortably/better.
Is wide frett and thin profile the best combo, or just alright?
There is no best or right or wrong. The is only what works for you. One of the things I spend most time on when discussing buids with customers is what they like in a neck. I ask them to consider these questions in this order because from experience these are the determining factors for a neck made to suit you.
Type of frets, wide, narrow, etc.
Width of the neck at the first fret
Width of neck at 12th fret.
Radius of the fingerboard.
depth of the neck at the first fret.
depth of the neck at the 12th fret of nearest fret to the heal if shorter.
Bound or unbound
Neck profile, C, V, D etc.
Finish
A lot of people will ask to have the neck based on an existing guitar and I'll take measurements and use my judgement to get close depending on materials and style of guitar. A few will leave it to me, in which case on most electric based instruments I'll use something close to the PRS profile but a little heavier and on archtops and acoustics a recipe of my own for the dimensions. I have never had a single customer unhappy with the results of this.
If you change any of the things above you through the balance out if you compare one to another. It is really all down to preference.