Well, in this post I want to know your opinion and I encourage you to vote the party who believe that represents you - just for fun.
I add a brief dossier with the most important parties and their ideology. And I warn you that Spain is not Greece, we have more parties.
PP - VOX - UPN
PP - Partido Popular (Popular Party): Right Center, conservative liberalism, economic liberalism, social conservatism, Christian democracy, monarchism, Christian humanism, Europeanism, Spanish nationalism.
Vox: Right, conservative liberalism, economic liberalism, social conservatism, Europeanism, monarchism, Spanish nationalism.
UPN - Unión del Pueblo Navarro (Navarra People's Union): Center Right, conservatism, Christian democracy, foralism, navarrism.
PSOE
Partido Socialista Obrero Español (Spanish Socialist Workers Party): Center Left, liberalism, social democracy, secularism, federalism, third way, Europeanism.
UPyD
Unión, Progreso y Democracia (Union, Progrees and Democracy): Center, liberalism, social liberalism, secularism, reformism, centrism, constitutionalism, European federalism, transversalism, Spanish patriotism, Spanish nationalism.
C's
C's - Ciudadanos (Citizens): Center Left, liberalism, social liberalism, secularism, autonomism, constitutionalism, European federalism, antinationalism.
EQUO - Compromís
Equo: Left, ecologism liberalism, federalism.
(Inside Compromís Coalition) BLOC Nacionalista Valencià (Nationalist Valencian Block): BLOC: valencianism, progressive, left, ecosocialism.
(Inside Compromís Coalition) IdPV - Iniciativa del Poble Valencià (Valencian People Iniciative): Left, ecosocialism, valencianism.
(Inside Compromís Coalition) EV - Els Verds (the Greens): Left, liberalism, ecologism valencianism.
Podemos
Podemos (Yes we can): egalitarianism, participatory democracy, left, republicanism. Defined as a citizens assembly.
IU - EUiA
IU and EUiA - Izquierda Unida y Esquerra Unida i Alternativa (United Left and United Left and Alternative): Eurocomunism, socialism, republicanism.
IAb - Izquierda Abierta (Opened Left): Social Democracy, anti-capitalism, ecosocialism. (Integrated into United Left)
PCE - Partido Comunista de España (Spanish Communist Party): Eurocomunismo, revisionism, anti-capitalism. (Integrated into United Left)
PCC - Partits Comunistes de Catalunya (Catalonian Communist Parties): Communism, Marxism-Leninism, Catalan. (Integrated into EUiA)
Independentist/Regionalists left parties → ERC, BILDU, CUP, Amaiur, BNG, ICV, PRC, PA...
CUP: Far left, anti-capitalist, socialism, participatory democracy, feminism, Euroscepticism, Catalan independence, pancatalanism.
BNG, ERC, CHA, and Aralar: Left, nationalism, republicanism, socialism.
BILDU: Left-wing nationalism, socialism, independence, sovereignism, Basque nationalism.
Amaiur: Left-wing nationalism, socialism, independence, sovereignism, Basque nationalism.
ICV: Eco-socialism, republicanism, catalanism.
PRC: Centro, reformism, regionalism, cultural cantabrism, Spanish patriotism.
PA: Social Democracy, Republicanism, andalucism.
Independentists/Regionalists right parties → FAC, PNV, CiU, Coalición Canaria...
PNV: center-conservatism, economic liberalism, Christian democracy, reformism, sovereignism, Basque nationalism.
CiU: center-right neo-Christian democracy, the Catalan independence, Catalan nationalism.
CC: Centro, monarchism, canary nationalism.
FAC: Conservatism, Asturian Regional