I'm Belgian, but expat in Spain (in Barcelona, which means I for sure attend the away games vs Barça and Espanyol but hoping to add a home game to the list too)
In my native country, I support Oostende. 2nd level, trying to get promoted to the top flight but unfortunately nowhere near. Must add that due to restructuring of Belgian football (the rich clubs trying to make promotion impossible with a large set of license rules) my interest in the football back home has been reduced to very low level.
I've lived in Ireland and Northern Ireland for 3 years and when based in Dublin I attended Shelbourne's games. Both home in Tolka Park and away (good memories of long bus trips with the other fans to attend away games in Cork, Derry, Longford, ... with the obligatory stops halfway to drink in a small village's pub
). I still follow Shels' results via the web but it's been long time that I've been back on the island.
My favourite team playing in Europe is Rosenborg BK from Norway.
Other than that, and I realise this is obscure, I try to follow (using the web again) Belediye Vanspor of Turkey (really long story) and Israeli football. In the Israeli top flight it's a tough choice between Maccabi Haifa (due to Dudu's past with the club) and Hapoel Tel Aviv (due to my political leanings). I support the Israeli national team too due to Dudu Aouate's undisputed status in the Israeli goal.
I follow English and Scottish football but more or less a neutral there.