It all depends on the airline and the current market conditions. Ryanair are known for wanting younger more impressionable people with no life experience so that they do as they're told and don't complain. Easyjet are known for milking pilots for all they're worth via the integrated system. There are still a lot of other options where age and money aren't important. It's always been feast or famine in the airline world, and we're at rock bottom now so there will be a pilot shortage in the next few years (it's already hitting the US) so just make sure you've got a licence and a pulse.