Adding to what WarDragon and Adslahnit have said, certainly PCs will opt to take less artifacts if they like the results. Actually my players (all of whom have divine PCs now) have had trouble coming up with a list of four specific items they wanted to transform into what I've called "Soul Objects" in game terms, which is to say the four specific items that increase in power as the character does. Coming up with one or two was pretty easy for all of them, and going to three wasn't a problem for most, but several players had trouble imagining what they'd want a fourth item to do on top of the stuff granted by the other three and their feats, class powers and divine abilities.
So I invoked the "gain divine abilities equal to DR" rule for the game, especially because two players who underwent a rather... unorthodox, method of ascension, ended up with more than two Portfolios and therefore were "in the hole" as far as divine abilities were concerned (because I insisted that the extra Portfolios be paid for- they had the choice of having only two during ascension and opted to be greedy). So those two PCs gave up artifacts to pay for their extra Portfolios. But as soon as the other players saw that, they wanted to have the option for themselves, especially the two big powergamers of the party. I limited regular characters to giving up a maximum of one artifact in exchange for abilities, to try curbing abuse; even so several players have taken the option.
So I invoked the "gain divine abilities equal to DR" rule for the game, especially because two players who underwent a rather... unorthodox, method of ascension, ended up with more than two Portfolios and therefore were "in the hole" as far as divine abilities were concerned (because I insisted that the extra Portfolios be paid for- they had the choice of having only two during ascension and opted to be greedy). So those two PCs gave up artifacts to pay for their extra Portfolios. But as soon as the other players saw that, they wanted to have the option for themselves, especially the two big powergamers of the party. I limited regular characters to giving up a maximum of one artifact in exchange for abilities, to try curbing abuse; even so several players have taken the option.