I'm not sure what you mean, quite, Bonsoir. He pays maintenance for them (at the same rate it was set at 6 years ago). He has them most weekends. At the weekends what he does with them tends to be what he wants, i.e. they go to the shops, have a meal out, otherwise stay at home watching Sky Sports. He ensures they do their homework (well, his wife does).
He has never taken them to a theme park or to "do" anything they like, e.g. To the leisure centre to do a sport of some kind, or a craft place (DD likes this). He likes to stay at home, eat, and watch tv (one of the contributing factors to the end of our marriage!)
I would not tell him what he "should" do on his weekends but I do think that as kids get older they want to pursue more activities and this should be encouraged and not stymied because "it detracts from my time with them".
He comes to parents' evenings and plays at school and things most of the time, not all of the time. He phones them every night, except when he is out for dinner which is about once a week. If he cannot speak to them and thinks it is because I am deliberately preventing it (which I never do), he is very abusive. He does not understand that, if I get home from work at 7pm and the kids go to bed at 8.30, then for him to spend half an hour every night on the phone to them takes a lot of "my" time away. He will not phone earlier, which I have suggested. His response was "don't be silly, Ginda" and then he just carried on calling at 8pm.
He has no real conception of the realities of organising 2 kids every day, as he installed his current wife as soon as he and I separated, whereupon she immediately stopped all employment and devoted herself to him and therefore does most of what I expect him to do, with the DCs. I am grateful for that, though obviously I would prefer it if he showed more understanding of their needs himself.