In our relationships, most of the time we insist on keeping his hobbies separate, but you can use these hobbies to make the relationship more intense & close. There are several ways of romancing him, use the things that they like most.
•    Plan for a movie that somehow encourages his hobbies & create the full atmosphere with popcorn & cold drinks.
•    Try to learn the things they like. If possible then purchase them some books related to the hobby. Talking about their hobbies with them can make them understand that you are trying to accept their hobbies & supporting them.
•    Sometimes for some enjoyment wear the jersey of their favourite team.
•    For gift purposes try to figure out some gift items related to their hobbies & also make them feel your love.
If he is a great football fan then create some cookies of football shape, which will give him an pleasant surprise.
•    Trace out some special show or games that complement his hobbies & purchase two tickets. It will not only encourage his hobby, but you will get some time to spend together.
•    When his favourite match is going on, try to get involved with that. Watch the match with your partner & enjoy the game.
•    Go for some night out & chose the place that will warm up his hobbies like- golf or some architectural creation etc.