Space: If you prepare large meals regularly, it might be a good idea to choose a larger oven to cook multiple dishes at the same time. If you cook occasionally, a more compact oven might be the better choice.
Grills: If your oven includes a grill, you will have more options when cooking.
Fan: If an oven includes a fan, your food will cook more evenly due to the circulation of warm air.
Self-cleaning: If you choose a pyrolytic oven, the high-temperature setting helps burn all the grease and residue to ash. This can be wiped away after the oven has cooled down. Although more costly, this feature will help to reduce your cleaning time.