Assessing Ethereum trading pairs involves looking at several factors. The first is liquidity, which refers to the ease with which a token can be bought or sold without affecting its price. Pairs with higher liquidity are generally more stable and less susceptible to price manipulation. Another factor to consider is the trading volume, which indicates the level of activity for a particular pair. Pairs with higher trading volumes are typically more liquid and have tighter spreads. Lastly, the pair's historical performance can provide insights into its potential future movements.