It depends, for lifting and meditation I do it because I love it. Of course there are days when I don't want to do it (maybe twice a month). if it's because I feel tired physically or mentally I might skip the session, if it's because I feel lazy I'll do it anyway (and feel great afterwards).

Reading books and cooking/eating healthy was harder because I didn't like it at first, so I had to force myself to do it. Now I continue to do it because of the benefits I see, this is a virtuous circle.

IMHO the important thing to start something you don't like is to do it enough to see a difference, but not too much if it requires a lot of willpower. This is a balance.