Having been with small and large men, it is easier to give a man with a small dick a 'less limiting' blow job, but I don't think that necessarily means it's a better one. Deep throating is much much easier...
My current BF is too big for me to deep throat. I WOULD LOVE TO BE ABLE TO DEEP THROAT HIM. YOU HAVE *NO* IDEA... LOL.
I TRULY agree that it's a matter of enthusiasm, and I really have to say, it's a shame that there are some women out there that don't enjoy sucking a man's cock. To me, it's pretty simple.... I get take the most sensitive part of a man's body, and pleasure him in every single way I can possibly imagine... with my mouth and my TONGUE.
If he's bigger, then it's up to me to use my imagination (there are some good tricks I've been taught, too)...
If you enjoy sucking a cock, then EVERYTHING about pleasuring a man with your mouth is going to turn you on. I've spoken with other women who have also said that their husbands or BF's say they're fantastic at giving blow jobs. The common denominator between myself and them, is how much of a turn on it is for me/us to do it... yummy!! | 
